下列物质的化学式书写正确的是( ) A.氧化锌OZn B.三氧化硫O3S C.氦

题型:选择题

问题:

下列物质的化学式书写正确的是(  )

A.氧化锌OZn

B.三氧化硫O3S

C.氦气He2

D.氧化钙CaO

考点:化学式的写法和意义化合价的求法
题型:选择题

在绩效管理中,一般以()为主,其考评分数对被考评者的结果影响很大,约占60%-70%的权重

A.下级考评

B.同级考评

C.上级考评

D.外人考评

题型:选择题

阅读理解

     Here is a story told an American general ( * * ) who was a very important figure in the American army

during the First World War. Everybody in the Untied States knew him and many people wished to have a

picture or something of his in their homes.

     Soon after the war, the general returned to Washington. One day he went to a dentist (牙医) and had

six teeth pulled out. A week later the general heard that his teeth were being sold in curiosity shops at $5

each. On each of the teeth there was a label (标签) with the name of the general and words, "Buy these

teeth and show them to your friends at home." The general got angry. He rushed to his office and ordered

six officers to go around the city and buy all his teeth.

     The officers went out and visited every curiosity shop in the capital. They were away from the office all

day. In the evening they returned and put on the table in front of the general the teeth they had bought.

They had collected 175 teeth.

1. The general's teeth were sold in __________.

A. the museum

B. the special shops selling some rare and interesting things

C. the department store

D. the hospital

2. In the evening, the officers went back with all the teeth which cost __________.

A. $785

B. $1, 050

C. $157

D. $875

3. The general felt __________ when he heard his teeth were sold.

A. happy

B. excited

C. sad

D. angry

4. There was the general's name on the label of each tooth. This shows that __________.

A. the general's name was known by most of the people in Washington

B. the shop-keeper wanted to have more customers buy the teeth

C. the shop-keeper tried to make the general more popular

D. Both A and C

5. The general ordered his men to __________.

A. look for his teeth and buy all of them

B. arrest the dentist at once

C. make all the shops stop selling teeth

D. buy all the teeth in all the shops

题型:选择题

毛细血管的内径仅有8-10微米,只允许红细胞______通过,它的管壁薄,其管内血流速度最慢.这些特点,有利于血液跟组织细胞充分进行______.

题型:选择题

党的民主集中制的基本原则是什么?

题型:选择题

影响输卵管复通术效果的因素,错误的是()

A.年龄越大妊娠率越低

B.与绝育术式有关

C.与吻合术后输卵管剩余长度无关

D.与绝育部位无关

E.显微外科手术效果更好

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