南京地铁控制中心是地铁日常运营的()、指挥、信息收发、通讯联络中心。

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问题:

南京地铁控制中心是地铁日常运营的()、指挥、信息收发、通讯联络中心。

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在一混合溶液中含有KCl、KBr、K2CrO4,其浓度均为0.01 mol·L-1,向溶液中逐滴加入0.01 mol·L-1AgNO3溶液时,最先和最后沉淀的物质是(   )

(AgCl、 AgBr、 Ag2CrO4Ksp分别为1.77×10-10、5.35×10-13、1.12×10-12

A.AgBr、AgCl

B.Ag2CrO4、AgCl

C.AgBr、Ag2CrO4

D.同时沉淀

题型:填空题

People always say that the earlier one learns a language, the ___1___ it is to do so, in theory it is that, ___2___, in my opinion, that refers to spoken language. Capability(能力) to practise some essential(基本的) ___3___ of a language and read between the lines can only be trained through proper reading ways and hard work ___4___. So spending money to help ___5___ learn English may ___6___ with disappointment. It is likely that the more you ___7___, the more you are let down.

The daughter of one of my friends ___8___ English in primary school, ___9___ her foreign teacher’s blindness ___10___ psychology(心理学). She did not want to go on ___11___ English until middle school, ___12___ a college student studying in English slowly ___13___ her interest in the language.

It is better to have the child learn Chinese, than to have some difficulty ___14___ learning English for several years. Having been engaged in English education, ___15___ find that despite(不管) their excellent ___16___, many students have ___17___ command(掌握) of English words and phrases. So I suggest that children ___18___ classical Chinese prose(散文), rather than ___19___ them to learn English hurriedly. Otherwise, they may ___20___ the best time to improve the language ability of their mother tongue.

1.A.easy  B. difficult     C. easier  D. more difficult

2.A.but   B. however     C. though       D. yet

3. A. opinions B. regards       C. requests      D. expressions

4.A.directly    B. orally  C. properly     D. indirectly

5.A.people      B. girls    C. children     D. boys

6.A.begin       B. start    C. finish  D. end

7.A.pay   B. get      C. buy     D. take

8.A.loved       B. liked   C. disliked      D. learned

9.A.because of       B. because      C. instead of   D. instead

10.A.of   B. at       C. in       D. to

11.A.learning  B. to learn      C. with learning     D. for learning

12.A.while     B. where C. when  D. as

13.A.introduced     B. practised    C. explained   D. developed

14.A.in   B. to       C. at       D. of

15.A.He  B.I   C. She     D. They

16.A.pronunciation B. phrase C. language    D. writing

17.A.few B. less     C. little   D. fewer

18.A.write      B. do      C. remember   D. memorize

19.A.have       B. let      C. cause  D. make

20.A.get back B. let go  C. bring in      D. go away

题型:填空题

材料计划按供货渠道分类可分为()。

A.物资企业供料计划

B.联合供应计划

C.建筑企业自供材料计划

D.建设单位供料计划

题型:填空题

预应力混凝土用热处理钢筋是用()经淬火和回火等凋质处理而成的。

A.热轧带肋钢筋

B.冷轧带助钢筋

C.热轧光圆钢筋

D.冷轧扭钢筋

题型:填空题

放大摄影X线管焦点为0.05,允许的最大放大率为()

A.2倍

B.3倍

C.4倍

D.5倍

E.6倍

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