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【简答题】
Chinese are very generous ( 慷慨的 ) when it comes to educating their children. Not caring about the 1 , parents often send their children to the best schools or even abroad—to England, the USA or Australia. The Chinese 2 that the more expensive the education is, the better it is. 3 parents will spend a lot of money on their children’s education. Even 4 parents will buy a computer for their son or daughter. Though they’re not rich, they would rather pay for the education. Parents can 5 that their children’s skills are different, skilled ( 有技能的 ) in some areas while poor in others. But most 6 fail to realize that the children today need more self-confidence. The problem is that parents are only educating their children on how to 7 tests and how to study well, but they are not teaching them the most important skills that they need. And these skills are important to help them to be 8 , happy and clever. Parents can achieve this 9 teaching their children the skills like cooking or doing other housework. Teaching a child to cook will 10 many of the skills that he will need later in life. Cooking needs patience and time. It is an interesting but difficult experience. A good cook 11 tries to improve his cooking, so he will learn to work hard and gradually finish 12 job successfully. His result, a well-cooked dinner, will make him 13 good and give him a lot of self-confidence. Some old machines, such as a broken radio or TV set that you give your child to play 14 , will make him interested and want to know more. He will spend hours studying them and trying to fix them. Your child might become an engineer when he 15 . These activities are teaching a child not only to study at school, but also to think, to use his mind. And that is more important.
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参考答案:
举一反三
【单选题】当计划工期等于计算工期时,总时差为零时,自由时差
A.
大于零
B.
可能为零
C.
无法确定
D.
必然为零
【单选题】当( )时,总时差为零的工作就是关键工作。
A.
计划工期等于计算工期
B.
自由时差为零
C.
计划工期等于实际工期
D.
工作持续时间不可压缩
【判断题】当计划工期等于计划算工期时,网络计划中某项工作总时差时为零则自由时差必为零。
A.
正确
B.
错误
【多选题】关于LC并联谐振回路中的特性阻抗,
A.
并联谐振回路谐振时的感抗或容抗
B.
并联谐振回路谐振时的容抗 ‍
C.
并联谐振回路谐振时的感抗
D.
特性阻抗等于
E.
并联谐振回路谐振时的阻抗
F.
并联谐振回路谐振时的总电抗
G.
并联谐振回路失谐时的总电抗
H.
特性阻抗等于
I.
并联谐振回路谐振时的电抗和
【单选题】关于LC并联谐振回路中的感性和容性,以下哪个正确( )。
A.
当外加信号源频率小于谐振频率时,呈感性,电流相位超前电压
B.
当外加信号源频率小于谐振频率时,呈容性,电压相位超前电流
C.
当外加信号源频率大于谐振频率时,呈感性, 电压相位超前电压
D.
当外加信号源频率大于谐振频率时,呈容性,电流相位超前电压
【多选题】关于LC并联谐振回路中的品质因数,
A.
反映并联谐振回路的损耗大小
B.
空载品质因素等于并联谐振时的感抗(或容抗)除以损耗电阻R
C.
空载品质因素等于并联谐振电阻Rp除以并联谐振时的感抗(或容抗)
D.
有载品质因素等于并联谐振时的感纳(或容纳)除以并联谐振电导Gp、信号源电导Gs、负载电导GL之和
E.
空载品质因素等于并联谐振时的总电抗与损耗电阻R之比
F.
空载品质因素等于并联谐振时的电抗之和与并联谐振电阻Rp之比
G.
空载品质因素等于特性阻抗与并联谐振电阻Rp之比
H.
相比仅考虑空载品质因素时的通频带,考虑有载品质因素时的通频带降低
【单选题】关于LC并联谐振回路中的感性和容性,
A.
当外加信号源频率大于谐振频率时,呈容性
B.
当外加信号源频率大于谐振频率时,电压相位超前电流
C.
当外加信号源频率小于谐振频率时,呈容性
D.
当外加信号源频率小于谐振频率时,电流相位超前电压
【单选题】当计划工期等于计算工期时,()的工作就是关键工作。
A.
自由时差为零
B.
总时差为零
C.
持续时间为零
D.
总时差等于自由时差
【单选题】关于LC并联谐振回路中的品质因数
A.
空载品质因素等于并联谐振电阻Rp除以并联谐振时的感抗(或容抗)
B.
相比仅考虑空载品质因素时的通频带,考虑有载品质因素时的通频带降低
C.
空载品质因素等于并联谐振时的电抗之和与并联谐振电阻Rp之比
D.
空载品质因素等于特性阻抗与并联谐振电阻Rp之比
【单选题】下列( )不属于前厅部的必备设备
A.
打时机
B.
打号机
C.
电话总机
D.
贵重物品保险箱
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