下图是“以极点为中心的半球图”,箭头表示洋流的流向。读图完成下列问题。 小题1

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问题:

下图是“以极点为中心的半球图”,箭头表示洋流的流向。读图完成下列问题。

小题1:下列叙述正确的是                                             

A.①洋流常年受东北信风吹拂

B.②是逆时针洋流系统的组成部分

C.此时北半球为冬季

D.③洋流是西南季风吹拂形成的小题2:有关洋流对地理环境的影响,叙述正确的是                            

A.Q地因受寒流影响,冬季气温较低

B.P地因受暖流影响,冬季气温较高

C.M海域多海雾,对航运造成不利影响

D.K海域的渔场是由于上升流而形成

考点:洋流的分布规律洋流对地理环境的影响
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薄壁工件内壁的磨削热不易散失,若温度过高,工件会磨成()面。(质量分析)

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中国药典规定标准九号筛相当于工业筛()

A.50目

B.80目

C.100目

D.120目

E.200目

题型:选择题

C

People think being an artist must be a wonderful way to earn one's living. Of course, there are lots of great things about working for oneself, at home alone. What I really like is that nobody tells me what time to start in the morning, what to wear; or whether I can take the afternoon off and go to a football match.

But then, I have no one to chat with when I'm bored, no one to discuss last night's match with during the lunch-hour. Sure, I can spend the afternoon doing something I enjoy like swimming, walking the dog, or even sleeping, if I choose. But the work will still be there when I do finally get back home, and it's still got to be finished in time. Unfortunately, working at home means that people can always find me, whether I’m bored or not and once I’ve answered the doorbell, it's too late——my thoughts have been interrupted. No one would dream of calling if I worked in an office, but in an office I find myself making cups of coffee and listening to friends' troubles. As they talk, my ideas disappear and I feel increasingly stressed thinking of my work waiting to be done.

66. What is the writer trying to do in the text?

A. To encourage readers to work at home.     

B. To explain why he has changed his job.

C. To describe his working life.             

D. To say how he would like to work.

67. What can the reader learn from the text?

A. How to start working for oneself.         

B. What it's like to work at home.

C. Why the writer decided to work for himself. 

D. How artists become successful?

68. What does the writer like about his life?

A. He has plenty of opportunities for sport.    

B. He is his own boss.

C. He can see people when he wants to.       

D. He has a comfortable place to work.

69. What does the writer imagine he might do with colleagues ( 同事 ) ?

A. Have meals in restaurants.                

B. Go to the swimming pool.

C. Spend time in the countryside.                 

D. Talk about sport.

70. Which of these notices would be most useful for the writer to put on his door?

题型:选择题

通常人们把拆开1 mol某化学键所消耗的能量看成该化学键的键能。键能的大小可以衡量化学键的强弱,也可用于估算化学反应的反应热(△H),化学反应的△H等于反应物的总键能与生成物的总键能之差。          

化学键Si—OSi—ClH—HH—ClSi—SiSi—C
键能/kJ·mol-1460360436431176347
工业上高纯硅可通过下列反应制取:SiCl4(g)+2H2(g)Si(s)+4HCl(g),该反应的反应热△H为   (  )

A.+412 kJ·mol-1

B.-412 kJ·mol-1

C.+236 kJ·mol-1

D.-236 kJ·mol-1

题型:选择题

下列气体中属于理想气体的是()。

A.空气

B.氮气

C.水蒸汽

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