下面是化工常用静止设备的有() A.容器 B.塔器 C.换热器 D.反应器

题型:多项选择题

问题:

下面是化工常用静止设备的有()

A.容器

B.塔器

C.换热器

D.反应器

考点:化工机械与设备化工机械与设备题库
题型:多项选择题

(8分)含硫化合物的种类很多,现有H2SO4、H2SO3、SO2、Na2SO3、BaSO4、CuSO4、Na2SO4这7种常见的含硫化合物。回答下列问题:

(1)写出硫元素在周期表中位置______________

(2)Ba2+有剧毒。某市曾发生一起“毒烧饼”事件,起因是烧饼摊主在制作烧饼的过程中误将碳酸钡当作干粉使用,导致多人食用烧饼后中毒。试写出碳酸钡与胃酸(以盐酸表示)反应的离子反应方程式                                          

(3)常温下,将铁棒置于浓硫酸中,无明显现象,课本上解释为发生了钝化,但有人认为未发生反应。为验证此过程,某同学经过思考,设计了如下实验:将经浓硫酸处理过的铁棒洗净后置于CuSO4溶液中,若铁棒表面             ,则发生了钝化。

(4)减少SO2的污染并变废为宝,我国正在探索在一定条件下用CO还原SO2得到单质硫的方法来除去SO2。该反应的化学方程式:                  

题型:多项选择题

下列组织或器官若发生增生,哪种有可能不受激素作用()。

A.涎液腺

B.甲状腺

C.肾上腺

D.前列腺

E.垂体

题型:多项选择题

《再别康桥》中诗人选取了“云彩”“金柳”“夕阳”“波光”“艳影”“青荇”“彩虹”“青草”“斑斓”等词语,给读者以视觉上的色彩想象,同时也表达了作者对康桥的一片深情。请将下面提供的词语,扩展成一段话,描绘出一个优美的意境。(不少于50字) (6分)

小河 柳树 夕阳 青草 歌儿

题型:多项选择题

It was Monday. Mrs. Smith’s dog was hungry, but there was not any meat in the house. Considering that there was no better way, Mrs. Smith took a piece of paper, and wrote the following words on it “Give my dog half a pound of meat.” Then she gave the paper to her dog and said gently, “Take this to the butcher(屠夫), and he’s going to give you your lunch today.” Holding the piece of paper in its mouth, the dog ran to the butcher’s. It gave the paper to the butcher. The butcher read it carefully, recognized that it was really the lady’s handwriting and soon did it as he was asked to. The dog was very happy, and ate the meat up at once. At noon, the dog came to the shop again. It gave the butcher a piece of paper again. After reading it, he gave it half a pound of meat once more. The next day, the dog came again exactly at noon. And as usual, it brought a piece of paper in the mouth. This time, the butcher did not take a look at paper, and gave the dog its meat, for he had regarded the dog as one of his customers(顾客). But, the dog came again at four o’clock. And the same thing happened once again. To the butcher’s more surprise, it came for the third time at six o’clock, and brought with it a third piece of paper. The butcher felt a bit puzzled. He said to himself, “This is a small dog. Why does Mrs. Smith give it so much meat to eat today?”

Looking at the piece of paper, he found that there were not any words on it!

小题1:The little dog went to the butcher’s ________ altogether during the two days.

A.three times

B.four times

C.five times

D.six times小题2:The butcher did not give any meat to the dog __________.

A. before he felt sure that the words were really written by Mrs. Smith on Monday

B when he found that the words on the paper were not clear

C. because he had sold out all the meat in his shop

D. until he was paid enough by Mrs. Smith

小题3:From the story, we can know that the dog was very ___________.

A.honest

B.kind

C.clever

D.foolish小题4:At the end of the story, you’ll find that __________.

A.the dog was clever enough to write on the paper

B.the dog dared not go to the butcher’s any more

C.the butcher was told not to give any meat to the dog

D.the butcher found himself cheated by the dog

题型:多项选择题

当婴儿眼睛()时,可指导婴儿先微闭眼睛。

A、有异物

B、有损伤时

C、有化学溶液时

D、疲劳感时

更多题库