下列化合物与Lucas试剂反应最快的是() A.正丁醇 B.仲丁醇 C.苄醇 D.环

题型:单项选择题

问题:

下列化合物与Lucas试剂反应最快的是()

A.正丁醇

B.仲丁醇

C.苄醇

D.环己醇

考点:化学工程有机实验有机实验题库
题型:单项选择题

补写出下列名篇名句中的空缺部分。(6分)

(1)浊酒一杯家万里,            ,人不寐, * * 白发征夫泪。(范仲淹《渔家傲•秋思》)

(2)      ,以望复关。不见复关,      。(《诗经•氓》)

(3)吾尝终日而思矣,      ;      ,不如登高之博见也。(《荀子•劝学》)

题型:单项选择题

As one comes to some crossroads, he or she sees a sign which says that drivers have to stop when they come to the main road ahead. At other crossroads, drivers have to go slow, but they do not actually have to stop unless, of course, there is something coming along the main road; and at still others, they do not have either to stop or to go slow, because they are themselves on the main road.

Mr. Williams, who was always a very careful driver, was driving home from work one evening when he came to a crossroad. It had a “SLOW” sign. He slowed down when he came to the main road, looked both ways to see that nothing was coming, and then drove across without stopping completely.

At once he heard a police whistle, so he pulled into the side of the road and stopped. A policeman walked over to him with a notebook and a pen in his hand and said, “You didn’t stop at that crossing.”

“But the sign there doesn't say ‘STOP’.” answered Mr. Williams, “It just says ‘SLOW’, and I did go slow.”

The policeman looked around him, and a look of surprise came over his face. Then he put his notebook and pen away, scratched his head and said, “Well, I’m in the wrong street!”

小题1:

Mr. Williams was driving ________ one evening.

A.to a party

B.to his office

C.home after work

D.to work from home小题2:

When he was stopped by a policeman, he ____.

A.was driving at a high speed

B.was driving onto the main road

C.was going to stop his car

D.was pulled into the crossroad小题3:

Though slowly, Mr. Williams continued driving at the crossing because________ .

A.he saw a “STOP” sign in the opposite street

B.he paid no attention to the traffic rules

C.he didn't have to stop

D.he was eager to get home小题4:

Looking round Mr. Williams, the policeman was surprised because__________ .

A.he met a mad man

B.he realized that he himself was mistaken

C.Mr. Williams dared to speak to him like that

D.Mr. Williams would not apologize to him

题型:单项选择题

一次点是指检测系统或控制系统中,直接与工艺介质接触的点,下列哪个点不是一次点()

A、取压点

B、热电阻安装点

C、化学介质分析采样点

D、节流元件点

题型:单项选择题

在使用卡他计来测矿井气候条件时,先将卡他计的贮液球放入60-80℃的热水中,使酒精全部充满仪器上部空间,然后再从水中拿出擦干。

题型:单项选择题

如今,人们对黄金周怀着“爱恨交加”的复杂感情,在品味难得的休息机会的喜悦的同时,奔波劳累的旅途也令他们______,对外出旅游的信心大打折扣,大大降低了休闲质量。
填入画横线部分最恰当的一项是( )。

A.无可奈何
B.心驰神往
C.望而却步
D.身心俱疲

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