为了防止燃料气带油,影响炉子的正常燃烧,燃料气分液罐和管道上一般都装有()A、电加热

题型:单项选择题

问题:

为了防止燃料气带油,影响炉子的正常燃烧,燃料气分液罐和管道上一般都装有()

A、电加热器

B、冷却器

C、伴热蒸汽管线

D、阻火器

考点:制氢工制氢工种初级工考试制氢工种初级工考试题库
题型:单项选择题

不宜用肝素抗凝血进行TDM的药物是()

A.苯妥英钠

B.氨基糖苷类抗生素

C.茶碱

D.地高辛

E.环孢素

题型:单项选择题

阅读理解

      An American went to Paris and bought a picture from a French artist (艺术家). The American thought the picture was very good. But when he came back to his room and was going to put the picture on the wall,he couldn't tell the top from the bottom of the picture. He turned the picture this way and that,but he still didn't know.

      He thought and thought. He hung(悬挂) the picture in the dining room. Then he asked the artist to dinner.When the artist came,the American said nothing to him about the picture,he went with the artist into the dining room to have the meal. When the artist began to eat,he looked at the picture for some time. When he began to eat the fish,he put on his glasses and looked at the picture again. Before he began to eat his apples,he stood up and walked to the picture and looked at it carefully. At last when he began to have his tea,he looked again and found the picture was upside down (颠倒).

      "Why,my friend," he said,"the picture is upside down. "

      "Indeed! But why did it take you so long to find that out?" said the American. "You painted it, didn't you?"

1. The American asked the French artist to dinner because       .

A. he wanted to thank the artist

B. he wanted to ask the artist to draw another picture for him

C. he wanted to know if he hung the picture right

D. he wanted to teach the artist a lesson

2.The artist looked at the picture several times,but he didn't say anything,because       .

A.he couldn't tell the top from the bottom at first, either

B. he thought it was an ugly picture

C. he wanted to say something after the meal

D. he thought it was right to hang the picture like that

3. Which of the following is NOT right?

A. Sometimes even an artist can't tell the top of a picture from its bottom.

B. The American was clever.

C.The French artist gave the picture to the American as a present.

D. The American liked the picture very much.

4. How many times did the artist look at the picture before he found it was wrong?

A. Only once.

B. Twice.

C. Three times.

D. Four times.

5.Why didn't the American ask the artist as soon as he came into the house?

A. Because he thought it would be foolish to do so.

B. Because he didn't want the artist to lose face.

C. Because he knew the picture was upside down.

D. Because he was hungry.

题型:单项选择题
若最简二次根式
b-a3b
2b-a+2
是同类二次根式,则ab=______.
题型:单项选择题

烧伤创面采用包扎疗法,如无湿透或感染.浅I度烧伤可在7~10天。一度烧伤可在3~4日更换第一次敷料。

题型:单项选择题

压缩机结构形式代号“V”代表的是()压缩机。

A.L型

B.V型

C.W型

D.扇形

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