正常情况下，外周血中HB主要为()A．还原HB B．氧合HB C．硫化HB D．碳氧

根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。在答题卡标有题号的横线上，完整写出空缺处所填单词的正确形式。（每空一词）

You’re standing with your classmates. E 小题1:  is talking except you. Perhaps you’re afraid they will laugh at when you say. Maybe you just aren’t b 小题2: enough to speak.

Shyness is like a snake that crawls（爬进）into our mouth and s 小题3:  us speaking. But we shouldn’t let it stay there.

I am 29 years old. Even today, that snake still sometimes v 小题4:me. When I was in high school, I was so shy that I wouldn’t talk to anyone except my parents and best friends. If a stranger asked me the

w 小题5:  to a local shop, it was as if I’d forgotten how to talk. One summer, I got a j 小题6:  in a restaurant and that helped a lot. It meant I had to talk to customers（顾客）. I had to tell them how m 小题7: 

their meal cost. I had to ask them if they want to drink Coke or Sprite.

This job taught me how to speak with people.

You may be too young to find a part-time job. But you can look for other c 小题8:  to speak with people. You can offer to help an old woman carry her heavy bag. O 小题9: you can go to get a newspaper for your family.

If you do these things for a while, the ‘shyness’ snake will soon begin to l 小题10:  you alone. It’ll look for another mouth to crawl into.

月球引力只有地球的六分之一。某同学体重490  N ，则他的质量是_________kg 。如果这名同学登上 月球，他的质量是__________kg 。重力将__________（选填“变大”、“变小”或“不变”）。

常用于皮肤表面的消毒剂为（）

A.酒精

B.高锰酸钾

C.硫磺

D.漂白粉

施工工序一般指（）。

A.单位工程之间

B.单项工程之间

C.分部工程之间

D.分项工程之间

收购合同生效前，收购双方要办理股权转让登记过户等手续。（）