应用注射器采集空气样品时，采集体积一般不大于（）。A．10ml B．50ml C．1

综合填空。

     Nearly 2 000 years ago, during the Han Dynasty, there was a person called Ying Chen. One day, he

invited Du Xuan to his house and treated him with wine. On the wall of the room 1. h_____ a red bow (弓).

Its shadow appeared in Du Xuan's cup. Du Xuan took the shadow for a snake. He was 2. f_____ but he

didn't refuse out of politeness. He drank the wine 3. w_____ his eyes closed.

      When he was back at home he felt so sick that he could 4. h_____ eat and drink any more. He sent

for the doctor and took some 5. m_____, but nothing could cure him. 6. W_____ Ying Chen went to ask

Du Xuan how he got so seriously ill, Du told him about the snake in the wine. Chen returned home,

thought hard,7. b_____ he could not find an answer. 8. S_____ the bow on the wall caught his eyes.

"That's it!" he shouted. He immediately sent for Du Xuan. He seated him where he sat before and offered

him a cup of wine. Du Xuan saw the snake-like shadow again. Ying Chen said, pointing at the shadow,

"The 'snake' in the cup is 9. n_____ but a shadow of the bow on the wall!" Now that Du Xuan knew

10. w_____ it was, he felt much easier. And strange enough, his illness disappeared the next moment.

      This story turned out to be the idiom "Bei Gong She Ying".

1._______ 2._______ 3._______ 4._______ 5._______

6._______ 7._______ 8._______ 9._______ 10._______

我国的探月工程“嫦娥一号”已发射成功而且正在进行科学探测．据科学家预测，月球的土壤中吸附着数百万吨的氦-3（He-3），其原子核中质子数为2、中子数为1．据统计，月球上的氦-3可以满足人类1万年以上的供电需求．下列关于氦（He-3）元素的说法正确的是（　　）

A．原子核外电子数为3

B．相对原子质量为2

C．原子结构示意图为

D．原子结构式意图为

3，5，12，55，528，( )

A．27980

B．28985

C．29040

D．30900

墙肢

教师行为的道德评价与一般的道德评价相比较没有鲜明特征。