模板单链DNA与引物的退火（复性）温度是（）。 A.22℃左右 B.72℃左右 C.

根据首字母提示及句意填入适当的单词。

1. You are supposed to s_____ hands when you meet a Chinese friend.

2. All the students like the e_____ that the physic teachers do every class.

3. What is the s_____? It says you should stop.

4. They arc p_____ to the boy who is playing soccer over there.

5. People k_____ when the people meet in Brazil.

6. Everything was f_____ with me because I was in Japan for the first time.

7. I am f_____. Thanks a lot.

8. I can eat with a k_____ and folk.

9. Remember to take out the r_____ when you leave the room.

10. People are pretty r_____ about time in Colombia

As technological advances put more and more time between early school life and the young person''s final access to specialized work, the stage of ________becomes an even more marked and conscious period.

A．adolescence

B．adjacency

C．advantage

D．adventure

关于法定检验的进口商品(检验检疫类别为M/N)，以下表述正确的有______。

A．应向报关地检验检疫机构报检
B．应在目的地申请检验
C．海关放行后，即可销售、使用
D．未经检验合格的，不准销售使用

根据我国“海港引航工作规定”，船长不符合要求的做法是（）。

A.应到规定的锚地或引航站等候引航员上船

B.抵达引航锚地（站）前应显示规定的信号或用VHF与引航站联系

C.船长有责保证引航员安全登离船

D.当船舶的干舷超过10米时，应为引航员提供符合规定的登船软梯

光缆沟回填土，每回填（）厘米踏实一次。

A.15

B.20

C.25

D.30