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【简答题】
化简求值 (1)(9a 2 -12ab+5b 2 )-(7a 2 +12ab+7b 2 ),其中 a= 1 2 ,b= 1 2 . (2)已知|x+2|+(3x-2) 2 =0,求 1 2 x-2(x- 1 3 y 2 )+(- 3 2 x+ 1 3 y 2 ) 的值.
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参考答案:
举一反三
【判断题】当其他条件不变时,资本边际效率上升,则投资增加。( )
A.
正确
B.
错误
【单选题】以下磁盘调度算法中,( )可能出现“饥饿”现象
A.
先来先服务
B.
扫描算法
C.
循环扫描算法
D.
最短寻道时间优先
【简答题】信道中的噪声包括( )和( )。
【单选题】One disadvantage of permanent life insurance is that it is much more expensive than term life insurance.
A.
Universal life insurance was the best solution to the rigidity of whole life insurance. It let consumers enjoy much greater flexibility by allowing premium payment amounts to be adjustable. With a universal life policy, you could also withdraw from your plan without the heavy penalties and interest that whole life plans carried with them.
B.
Other varieties of permanent life insurance later came on the scene. For example, variable life insurance emerged as a solution for consumers who wanted to take a greater risk with their investment but also gain the potential for much higher returns. Variable permanent life insurance is the best of both worlds because it combines the perks of whole life with the flexibility of universal. You can have greater control over the money you invest in your plan when you choose this option. Additionally, permanent health insurance plans all have great tax breaks, so when you combine the tax incentives of permanent life with the possible returns of investing in a variable plan, you may see your money explode in growth over time. No matter which permanent life option you choose, if you think you are a candidate for coverage, you should seek out an independent financial advisor that can assist you with choosing from these options.
C.
You know that investing, risk, and liquidity are not your primary motivators for purchasing life insurance. The main reason is to protect your family with money for their living expenses if you die. The great thing about permanent life insurance is that it accomplishes this goal for your whole lifetime, and although investing is secondary, you also get the key benefit of an investment component. A permanent life insurance policy has a kind of "savings account" built right into the policy, so you have the ability to tap into or borrow against the cash value your policy has accumulated over time.
D.
Permanent life insurance is better than term life because term insurance only covers you for a predetermined number of years. Although term life plans carry much lower premium payments, the policies build up no cash value over time. Permanent life plans are also great because the cash value that you accumulate over time is not taxed until you decide to withdraw it. You can even sidestep those taxes by taking out a loan against your policy. This is great for people who make a lot of money because they can shelter their earnings in a permanent life plan when they have maxed out all of their other investment options.
E.
One of the primary disadvantages of permanent life insurance is that it provides more coverage than most people may need. In addition, if you have not maxed out your other investment options, then a permanent life plan might not be your best investment. The goal of permanent life insurance is to provide growth and protection for investors, but most should really seek out those characteristics in separate plans.
F.
Additionally, because premiums for permanent life plans tend to be very high, you may be tempted to buy less of a death benefit than you really need. For example, a permanent life insurance policy for $1 million for a 40-year-old woman in great health may cost her as much as $13,900 a year. On the other hand, that same woman could land a $1 million term policy for 20 years for about $750. That's a massive price difference, so cost may essentially be the biggest disadvantage of permanent life insurance.
G.
Finally, permanent health insurance plans may not be very transparent, so it may be difficult to figure out how much the policy is actually worth as an investment. Some financial experts point out that a good solution to this problem may be to buy a term policy and invest the rest of your money through other avenues. The first place to start is to ask for life insurance quotes and evaluate which option is right for you.
【单选题】20世纪七大发明技术,按人类对其需要的迫切性的排序排在第一位的是( )。
A.
化学合成和分离技术
B.
信息技术
C.
生物技术
D.
纳米技术
【简答题】信道中的噪声包括( )和( )。
【简答题】信道中的噪声包括( )和( )。
【单选题】20世纪七大发明技术,按人类对其需要的迫切性的排序排在第1位的是( )。
A.
化学合成和分离技术
B.
信息技术
C.
生物技术
D.
纳米技术
【单选题】采用厚度相同的多层保温材料分别对圆筒壁和平壁保温,以防止热量散失,以下说法正确的是( )。
A.
不同导热系数材料的放置位置不影响圆筒壁保温效果
B.
应该把导热系数大的材料放在圆筒壁高温侧
C.
应该把导热系数大的材料放在平壁高温侧
D.
不同导热系数材料的放置位置不影响平壁保温效果
【判断题】当其他条件不变时,资本边际效率上升,则投资增加。( )
A.
正确
B.
错误
相关题目:
【单选题】One disadvantage of permanent life insurance is that it is much more expensive than term life insurance.
A.
Universal life insurance was the best solution to the rigidity of whole life insurance. It let consumers enjoy much greater flexibility by allowing premium payment amounts to be adjustable. With a universal life policy, you could also withdraw from your plan without the heavy penalties and interest that whole life plans carried with them.
B.
Other varieties of permanent life insurance later came on the scene. For example, variable life insurance emerged as a solution for consumers who wanted to take a greater risk with their investment but also gain the potential for much higher returns. Variable permanent life insurance is the best of both worlds because it combines the perks of whole life with the flexibility of universal. You can have greater control over the money you invest in your plan when you choose this option. Additionally, permanent health insurance plans all have great tax breaks, so when you combine the tax incentives of permanent life with the possible returns of investing in a variable plan, you may see your money explode in growth over time. No matter which permanent life option you choose, if you think you are a candidate for coverage, you should seek out an independent financial advisor that can assist you with choosing from these options.
C.
You know that investing, risk, and liquidity are not your primary motivators for purchasing life insurance. The main reason is to protect your family with money for their living expenses if you die. The great thing about permanent life insurance is that it accomplishes this goal for your whole lifetime, and although investing is secondary, you also get the key benefit of an investment component. A permanent life insurance policy has a kind of "savings account" built right into the policy, so you have the ability to tap into or borrow against the cash value your policy has accumulated over time.
D.
Permanent life insurance is better than term life because term insurance only covers you for a predetermined number of years. Although term life plans carry much lower premium payments, the policies build up no cash value over time. Permanent life plans are also great because the cash value that you accumulate over time is not taxed until you decide to withdraw it. You can even sidestep those taxes by taking out a loan against your policy. This is great for people who make a lot of money because they can shelter their earnings in a permanent life plan when they have maxed out all of their other investment options.
E.
One of the primary disadvantages of permanent life insurance is that it provides more coverage than most people may need. In addition, if you have not maxed out your other investment options, then a permanent life plan might not be your best investment. The goal of permanent life insurance is to provide growth and protection for investors, but most should really seek out those characteristics in separate plans.
F.
Additionally, because premiums for permanent life plans tend to be very high, you may be tempted to buy less of a death benefit than you really need. For example, a permanent life insurance policy for $1 million for a 40-year-old woman in great health may cost her as much as $13,900 a year. On the other hand, that same woman could land a $1 million term policy for 20 years for about $750. That's a massive price difference, so cost may essentially be the biggest disadvantage of permanent life insurance.
G.
Finally, permanent health insurance plans may not be very transparent, so it may be difficult to figure out how much the policy is actually worth as an investment. Some financial experts point out that a good solution to this problem may be to buy a term policy and invest the rest of your money through other avenues. The first place to start is to ask for life insurance quotes and evaluate which option is right for you.
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