关于染色体、DNA、基因关系的叙述正确的是 [ ] A．DNA是染色体的唯一成分

Cooperation(合作) and competition are 1  important. They’re necessary for a person to achieve success in life.

Learn to be cooperate with others. No one likes a selfish(自私的) or greedy(贪婪的)person. However, everyone likes a cooperative and friendly person. Everything we do today,   2  in doing business or making friends, depends on our ability to  3 with one another. In our society, most tasks(任务) need the cooperation of many people  4 they can be finished successfully. So we must try to be cooperative. Each person   5 a small part of a machine . If only one part is out of order, the machine can’t be running  well.  6 , transportation and communication systems are developing quickly and people all over the world can keep in line with each other _7 . It’s hard for a person who is away from the society to have a deep understanding of the world he 8 . Cooperation is becoming more and more important for a person to get a good life.

Being competitive(竞争的) also has a place in life. If you want to get more success and be better than others, you must work harder and study more carefully. The desire(愿望) to succeed and do better than others   9 us to work harder. If there were no competitions, a sports meeting would never be   10 and successful, and we could never have champions(冠军).

We cooperate with others to be more competitive, we compete to get a better environment for cooperation leads(带领) us to realize our goals and meet our needs.

根据短文内容选择正确答案。

小题1:A. all                B. both                    C. neither

小题2:A. if                 B. weather                 C. whether

小题3:A. get along          B. get off                 C. get back

小题4:A. in order           B. in order to             C. so that

小题5:A. likes              B. is like                 C. looks like

小题6:A. Except             B. Besides                 C. But

小题7:A. easier             B. much better             C. more easily

小题8:A. lives in           B. lives on                C. lives

小题9:A. encourage          B. encourages              C. encouraged

小题10:A. excited            B. interested              C. exciting

从一个长方体木料上截下一个体积是64cm²r的小正方体木料后，剩下部分是一个棱长4cm的正方体．原来这个长方体的表面积是______平方厘米．

下列能出现内部混响（彗星尾征）的是（）

A.超声束垂直于胸壁和肺表面引起多次反射

B.超声束垂直于腹壁引起内部混响

C.超声束在器官组织的异物内来回反射

D.超声束垂直射入骨膜和骨表面

E.超声束平行关节软骨和骨表面时

某建筑安装工程，采用工料单价法计价程序计算工程造价，以直接费为计算基础，其直接工程费为1000万元，措施费为100万元，间接费费率为10％，利润率为5％，计税系数为3.41％，则该工程的含税造价为（ 　）万元。

A．1194.39

B．1302.97

C．1308.14

D．1313.82

填料式清水泵及热水泵允许泄露，但一般不超过每分（）滴。

A、20-40

B、40-60

C、60-80

D、80-100