在给定条件的水溶液中一定能大量共存的离子组是 [ ] A.能与Al反应生成H2的

题型:选择题

问题:

在给定条件的水溶液中一定能大量共存的离子组是 [ ]

A.能与Al反应生成H2的溶液:Ca2+、NH4+、HCO3-、Cl-

B.c(Fe2+)=0.05mol/L的溶液:H+、Na+、NO3-、SO42-

C.pH=12的溶液:Na+、K+、Cl-、NO3-

D.由水电离出的c(H+)=10-12mol/L的溶液:K+、Ba2+、ClO-、CO32-

考点:离子共存
题型:选择题

一矩形线圈在匀强磁场中以一边为轴匀速转动,磁场方向与转动轴垂直,线圈中感应电动势e与时间t的关系如图所示,在T/12时刻,线圈平面与磁场方向的夹角等于__________。

题型:选择题

阅读理解。

    It was several years since Adolf Hitler came into power in Germany. And now his army was marching into

some parts of Europe. He must be in the prime of his career. 

    One day Hitler went to an exhibition where the works of school children were on show. He seemed to have

great interest in the exhibits-inventions as well as carvings, drawings. After having walked around the hall and

examined everything, he said he was ready to meet the young artists. And soon a group of children came into

the room to salute (向-----敬礼) him.

    "Well, well. You did very good work." nodded Hitler in satisfaction. "I promise on my honor I'd satisfy you

with whatever you want. What'd you wish to be if I were your father?"

     "A sailor sailing the sea." one of the boys answered.

     "Good. I'll have you join my navy and some day you will rule the oceans."

     "Ask for anything? What'd you wish to be if I were your father?" he asked a second boy.

     "A painter as great as Rembruant."

     "Good. You are to be sent to the Fine Art School and surely you will make an even greater painter."

     When Hitler caught sight of a sad-looking boy he frowned (皱眉), then quickly forced a smile,"There my

boy, in spite of my point of view towards the Jews, I'd do you a favor and your dream will come true. What'd

you wish to be if I were your father?"

     The boy looked straight at the man.

     "An orphan (the child who has no parents)." he murmured.

1. Hitler promised to satisfy the children with whatever they want because _____. [ ]

A. he wanted all the children to live a happy life

B. he wanted to make a good impression on the children

C. he liked paintings very much

D. he liked all the children

2. Hitler frowned when he saw the sad-looking boy because _____. [ ]

A. the boy was recognized to be a Jew

B. the boy didn't come to the front to salute him

C. the boy didn't want to ask for anything

D. the boy was sad-looking

3. Judging by what the boy said we can see that _____.[ ]

A. the boy's parents had died

B. the boy had no brothers or sisters

C. the boy hated Hitler very much

D. the boy wanted himself to be an orphan

4. Which of the following statements is NOT true? [ ]

A. Hitler wanted to be the father of the children.

B. The boy was both clever and courageous (勇敢的).

C. Rembruant was a great painter.

D. Hitler did not like Jews.

题型:选择题

在我国经济发展的各部门中占主导地位的是[ ]

A.农业

B.工业

C.旅游业

D.建筑业

题型:选择题

儿童时期发育最晚的系统是()

A.生殖系统

B.淋巴系统

C.神经系统

D.呼吸系统

E.循环系统

题型:选择题

我国采用资产评估的方法主要有______。

A.收益现值法

B.重置成本法

C.现行市价法

D.清算价格法

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