装配精度完全取决于零件制造精度的装配方法是（）。A.完全互换法 B.分组选配法 C.

下列反应的离子方程式错误的是                                      

A．碳酸钙跟盐酸反应： CaCO₃+2H⁺→Ca²⁺ + CO₂↑+H₂O

B．铁跟氯化铜溶液反应:Fe + Cu²⁺→ Cu + Fe²⁺

C．氯化铵水解：NH₄⁺ + H₂O NH₃?H₂O+ H⁺

D．氢氧化钡溶液跟稀硫酸反应： Ba²⁺ + OH^- + H⁺ + SO₄^2-→ BaSO₄↓+ H₂O

------Hi, Jim. You are so early!

------Oh, I _____________  up early. It’s so good.

A．used to get

B． used to getting

C．am used to get

D．am used to getting

阅读理解。

      We may be very pleased with the rapid progress we have made in every field of study. But the

way to test a student's knowledge and ability still remains as poor as it was, We have almost done

nothing to improve our examination system.

      It is well known that the examination system we are now using may be a good way of testing a

student's memory, but it can tell you nothing about a student's ability. It does no good to students

and teachers.

      As soon as a child begins school,he enters a world of examination that will decide his future of job.

      In fact a good examination system should train a student to think for himself. But it now does

nothing about that. So students are encouraged to member what is taught. It does not enable them to

gain more and note knowledge. The students who come out first in the examination often may not be

the best in their studies. 

     Besides, the examinations often force teachers to train students what to do with the coming

examination from time to time. There must be some simpler and better way to test a student' s ability

besides knowledge. And that is what we should do at once.

1. Now little has been done to________.

A. decide a student's job

B. test a student's ability

C. test a student's knowledge

D. test a student's memory

2. The examination system we are now using can only make the students________.

A. gain more and more knowledge

B. make rapid progress

C. remember what is taught

D. think for themselves

3. In order to make students gain high marks in the coming examination, teachers have to________.

A. develop their students' ability

B. fill their students' heads with much information

C. teach freely

D. teach their students how to study

4. The passage tells us about the importance of________.

A. getting examination system improved

B. taking examinations

C. testing a student' s knowledge

D. working hard at all lessons

（）季不宜进行废水处理场的活性污泥培养。

A、春

B、夏

C、秋

D、冬

三民主义以推动中国资产阶级民主革命的作用的表现是：（）

①推动民主革命高潮武昌起义的到来。

②建立了资产阶级共和国中华民国。

③指导制定并颁布了《中华民国临时约法》。

④新三民主义成为国共两党和各革命阶级结成统一战线的政治基础

A.①②③④

B.①②③

C.②③④

D.①②④