关于桑椹胚说法错误的是（） A.也称早期囊胚 B.由16个细胞组成 C.桑椹胚透明带

根据首字母提示完成单词拼写。

1. — Have you ever been to Beidaihe?

    — Yes, twice. You can meet many f____ there.

2. Before handing in your papers, you had better spend sometime c_______ the mistakes in them.

3. A______ my partner is a little weak in French, he tries his best to improve it now.

4. Sandy won first prize in the singing competition, she is of course the p____ of us.

5. When I hurried to the office, I found him s_____ the Internet there.

6. She is ______(练习)speaking English with foreigners now.

7. Would you please tell me how long it _____(花费)to finish your homework every day?

8. Have you ever read the novels ____(写)by Lun Xun?

9. I've traveled to Singapore once. It's about 5 ____(小时)flight.

10. Everyone hopes that there will not be any ______(thief)in the world.

某上市公司股本总额6000万元，股票面值10元，以下情况中，哪一个构成该公司股票暂停上市的原因()

A．公司决定将股本总额减少1000万元

B．为买现上述决定，公司收购本公司股票100万股

C．由于上述收购，持有股票面值达1000元以上的本公司股东人数变为950人

D．由于上述收购，向社会公开发行的股份总数变为125万股

烧结砖回弹法相邻两弹击点的间距不应小于（），每一弹击点应只能弹击一次。

A.10mm

B.15mm

C.20mm

D.25mm

钢轨探伤，因故暂停探伤作业时，如续探则应后退不少于（）重复探伤。

保本点为( )件。

A．4000

B．6000

C．8000

D．10000