在商业银行资产负债管理中，规模对称原理的动态平衡基础是（）。 A.合理经济体制 B.

甲施工企业与乙钢材经销商签订了一份购销合同，总货值为60万元人民币，双方在协商定金数额时发生意见分歧。根据《担保法》的规定，该定金额最多为( )万元人民币。

A．3

B．6

C．12

D．18

When I say “work is rest”, some people will say I’m crazy. But that’s the way it is—we need to rest. Without rest, we will die. At a minimum, we won’t have the energy to work.

Nobody forces us to be so stupid about this. We just don’t know how to rest properly. We rest in ways that are not restful, even stressful. Some of our ways of rest interfere (妨碍) with our working energy. Instead of sleep, we go to the movies and clubs, drink or have a smoke with friends. This is because we misunderstand the meaning of “rest.”

We should remember that rest means not working, both physically and mentally. Only then is it real rest. When tired, rest. It’s simple. Actually, dogs and cats are smarter about this than people. People are stupid enough to rest in ways that destroy their capacity (能力) to work.

Rest and work always go together. There must be a balance: work during the day and rest at night. When the sun comes up, one has plenty of strength to work well and enjoy it. In other words, rest is a kind of investment, so that one has the strength and energy to continue working. So we need rest to work, recognizing that we can’t have one without the other. Rest is what recharges our batteries. We need enough time to charge up adequately to the tasks we undertake. Thus, we need to rest correctly; otherwise, illness will occur and also can affect the efficiency of our work.

Rest can’t be skimped. Without enough rest, good work is impossible. This is why we say that rest is another kind of work.

53. Which of the following is the best rest according to this passage?

A. Going to the movies and clubs.    

B. Drinking or having a smoke with friends.

C. Sleeping at home.                         

D. Playing cards with family members.

54. The underlined word “skimped” in the last paragraph most probably means _____.

A. not supplied with enough of what is needed

B. strengthened in spite of the conditions

C. recharged during the time of working            

D. invested without any of the cost

55. We can know from this passage that _____.

A. dogs and cats are smarter than we human beings

B. rest can make us work more efficiently

C. it’s not proper to sleep in the daytime for people.

D. rest is more important than work for people

56. Which of the following is the main idea of this passage?

A. Rest is another kind of work.                    

B. How to form the habit of sleeping.

C. Sufficient rest leads to success.              

D. Why people need to rest.

在为电厂中，配用阀门电动装置进行操作的阀门种类主要有（）、（），蝶阀和球阀等。

对工字形截面钢筋混凝土构件承载力计算，下列说法中正确的是( )。

A．受拉翼缘对构件受弯承载力没有影响，因此构件承载力计算时可以不考虑受拉翼缘
B．剪扭构件承载力计算时，首先满足腹板矩形截面完整性原则进行截面划分，再计算每个矩形对剪扭承载力的贡献
C．斜截面受剪承载力计算时，规范规定可以考虑翼缘对承载力的提高
D．剪扭构件承载力计算时，首先满足腹板矩形截面完整性原则进行截面划分，再计算每个矩形对抗扭承载力的贡献

目前多主张以海平面静息状态下肺动脉平均圧（）或运动时肺动脉平均圧（）称为肺动脉高压。