下列符号表示两个氢原子的是 A．H+ B．2H C．H2 D．2H2

搜题请搜索小程序“爱下问搜题”

问题选择题

下列符号表示两个氢原子的是

A．H⁺

B．2H

C．H₂

D．2H₂

答案

答案：B

题目分析： A．H⁺表示氢离子； B．2H表示两个氢原子；C．H₂表示一个氢分子；D．2H₂表示两个氢分子；故选B

多项选择题

在进行套期保值会计核算时，需要设置的账户有（）

A．套期工具

B．套期损益

C．衍生工具

D．被套期项目

E．公允价值变动损益

句型转换

按每小题后的要求转换下面的句子。

1. The early flight will take off at 4:20. (对画线部分提问)

___________________ will the early flight take off?

2. The Grand Canyon is 1. 6 kilometers deep on average. (对画线部分提问)

___________________ is the Grand Canyon on average?

3. She usually walks to school every day. (改为同义句)

She usually goes to school ___________________ every day.

4. Little Tom is proud that he does well in math. (改为同义句)

Little Tom is proud that he is ___________________ math.

5. There are over 500 students joining in the exam. (改为同义句)

There are over 500 students ___________________ in the exam.