搜题请搜索小程序“爱下问搜题”
问题 选择题

氯化碘(ICl)的化学性质跟氯气相似,预计它与水反应的最初生成物是(　　)。

A．HI和HClO

B．HCl和HIO

C．HClO3和HIO

D．HClO和HIO

答案

答案：B

ICl中氯元素呈-1价,碘元素呈+1价,因此与水反应生成的是HCl和HIO。

单项选择题 A1/A2型题

"阴亢者，胜之以阳"所说明阴阳之间的关系是（）

A.阴阳对立

B.阴阳互根

C.阴阳平衡

D.阴阳转化

E.阴阳制约
查看答案
句型转换

句型转换。

1. They have been talking for the whole three hours.  (一般疑问句)

    _______ they _______  _______ for the whole three hours?

2. We have been living here for 12 years.  (改为同义句)

    We have been living here               12 years             . 

3. To spit in public places is not polite.  ( 同义句) 

                  isn't polite                            in public places.

4. We have been playing football for two hours.  (对划线部分提问)

    _______  _______ have you been playing football?

5. "Don't stand in the way," the policeman said to the boy. (根据句意进行改写) 

    The police told the boy                                         in the way.

6. He started to practice the guitar three hours ago.  (改成含介词for的同义句)

    He                            practicing the guitar for three hours.

查看答案