如图为甲、乙、丙三种固体物质(不含结晶水)的溶解度曲线。下列说法错误的是 A.

题型:选择题

问题:

如图为甲、乙、丙三种固体物质(不含结晶水)的溶解度曲线。下列说法错误的是

A.t1℃时,三种物质中乙的溶解度最大

B.t2℃时,三种物质的饱和溶液中,溶质质量分数最大的是甲

C.可用降低温度的方法使t2℃时丙的饱和溶液变为不饱和溶液

D.t1℃时,将等质量甲、丙不饱和溶液分别用添加溶质的方法形成饱和溶液,所加的溶质质量相等

考点:固体溶解度气体溶解度
题型:选择题

Jack was too heavy and didn’t have a girlfriend. He felt very sad and went to a doctor for help. The doctor told him to eat less and exercise often.

One day, Jack was sitting by the road with his dog. Then a policeman came over. Jack stood up and began to run down the road. The policeman saw that and ran after him at once. After a few minutes the policeman caught Jack.

“Where are you going?” said the policeman. “Why did you begin to run when you saw me?” “Oh, no,” said the young man, “I am just doing exercise . Because I am too heavy, the doctor told me that I must run every day.”

“Oh, I see,” said the policeman. “sorry. You run to help yourself to keep healthy. That’s so good!” Then he ran after Jack to help him.

小题1:Jack wanted to          .

A. be good at running                B. makes friends with the policeman

C. help himself to lose weight(重量)

小题2:At first the policeman found the young man          .

A. was sitting and playing near the river

B. was playing with his dog by the road

C. was sitting by the road with his dog

小题3:Who ran faster?

A. Jack.               B. The policeman.               C. The dog.

小题4:Which of the following is NOT TRUE?

A. The policeman thought Jack was a bad man.

B. The doctor told Jack to run after the policeman.

C. The policeman said sorry to Jack.

小题5:At last, the policeman ran after Jack because he          .

A. wanted to help Jack to lose weight            B. wanted to be a good policeman

C. wanted to keep healthy as well

题型:选择题

工作评价主要解决了薪酬中的()公平问题。

A.过程

B.结果

C.外部

D.内部

题型:选择题

三种血细胞中,都不具有细胞核的是

A.成熟的红细胞和白细胞

B.白细胞和血小板

C.成熟的红细胞和血小板

D.上述三组都无细胞核

题型:选择题

风湿性心脏瓣膜病患者出现下列哪种征象应首先考虑有感染性心内膜炎的可能

A.心律失常

B.心力衰竭

C.阵发性心前区疼痛

D.发热持续一周以上

E.尿频、尿急、尿痛

题型:选择题

SQL语言的REVOKE语句实现()数据控制功能。

A.可靠性控制

B.并发性控制

C.安全性控制

D.完整性控制

更多题库