可用如图装置制取(必要时可加热)、净化、收集的气体是( ) A.铜和稀硝酸制一氧

题型:选择题

问题:

可用如图装置制取(必要时可加热)、净化、收集的气体是(  )

A.铜和稀硝酸制一氧化氮

B.氯化钠与浓硫酸制氯化氢

C.大理石和稀硫酸制二氧化碳

D.锌颗粒与稀硫酸制氢气

考点:气体的收集、净化、干燥通过实验装置图判断实验的可行性
题型:选择题

锅炉启动初期,投油或煤油混烧阶段电除尘器为什么不能投电场?

题型:选择题

账户的“借方”表示增加,还是“贷方”表示增加,取决于账户的()

A.性质

B.结构

C.形式

D.需要

题型:选择题

A:根据所给中文及句意,完成下列空格。(7分)

The old man ____________ (刷) his dog’s fur every day.

2.  Bill is very smart and he can always answer questions ______(正确地).

3.  The girl is very young, but she can speak some foreign           (语言).

4.  Fei Junlong and Nie Haisheng are the h_____ we admire very much.

5.  Don’t tell anyone about our plan. Keep it a s      .

B.用所给词的适当形式填空: (10分)

6.He then decided _______(have ) a great day out by motorbike.

7.Why not             now? (decide)

8.           (luck),he hurt himself in the accident..

9.The trip to the hill was really            . (bore)

10.We are cheering for our school basketball team. They are the            of the final. (win)

题型:选择题

先便后血,便血紫黯指的是()

A.溏结不调

B.近血

C.脓血便

D.远血

E.排便不爽

题型:选择题

中国历史上最早的专职警察机构是( )年建立的。

A.1898
B.1905
C.1895
D.1907

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