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【单选题】
心肌异长自身调节的作用是A.
保证初长度贮备
B.
保持无收缩
C.
调节心肌收缩能力
D.
使每搏输出量与后负荷平衡
E.
维持每搏输出量与回心血量平衡
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【单选题】2月25日,5月份的大豆合约价格为1750元/吨,7月份大豆合约价格为1720元/吨,某投机者根据当时的形式分析后认为,两份合约之间的价差有扩大的可能。那么该投机者应该采取( )措施。
A.
买入5月份大豆合约，同时卖出7月份大豆合约
B.
买入5月份大豆合约，同时买入7月份大豆合约
C.
卖出5月份大豆合约，同时卖出7月份大豆合约
D.
卖出5月份大豆合约，同时买入7月份大豆合约
【单选题】听力原文： The young people who talk of the village as being 'dead' are talking nothing but nonsense, as in their hearts they must surely know. The village is not dead. There is more life in it now than th...
A.
Because young people can't remember the villages.
B.
Because the two World Wars destroyed many villages.
C.
Because there are no job opportunities in villages.
D.
Because it seems that village life is gone for ever.
【简答题】“起运国(地区)”栏：
【简答题】“起运国(地区)”栏：
【简答题】“起运国(地区)”栏：
【单选题】听力原文： The young people who talk of the village as being 'dead' are talking nothing but nonsense, as in their hearts they must surely know. [32] The village is not dead. There is more life in it now th...
A.
Because young people can't remember the villages.
B.
Because the two World Wars destroyed many villages.
C.
Because there are no job opportunities in villages.
D.
Because it seems that village life is gone tor ever.
【单选题】听力原文： Many women are attracted by the excitement of being a flight attendant -- you earn your living and see the world at the same time. Yet, many people consider flight attendants to be simply multi-...
A.
They do routine work and speak a few languages.
B.
They see the world and earn a lot of money.
C.
They look pretty and look after passengers.
D.
They see the world and do routine work.
【单选题】听力原文： Many suffer from shyness. In order to give other people a chance to know more about you, you need to get over it. Then how to control shyness? First, make decisions not to hold back in conversat...
A.
Because it can help you in case you don't know what to say to others.
B.
Because many parties ask people to do this.
C.
Because you can show it to others at the party.
D.
Because shy people like to write instead of speaking.
【简答题】A．He will be charged with a minor driving violation. B．He will be put in prison for fif days. C．He will be fined a large amount of money. D．He will not be allowed to drive a bus in the county.
【单选题】听力原文： People over the age of 65 in the USA are called senior citizens. Life for these people is different from that for younger Americans. Most senior citizens retire, or no longer work full time. Als...
A.
People of 65 years old.
B.
People over 65 years old.
C.
People between 60 and 65 years old.
D.
Retired people.
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