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搜题
【单选题】
关于曲轴飞轮组说法错误的是哪A.
可以把活塞连杆组传来的气体压力转变为扭矩对外输出
B.
承受交变载荷的冲击。
C.
曲拐是由一个连杆轴颈和它两端曲柄及主轴颈构成。
D.
平衡块可以不用考虑
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举一反三
【单选题】One main purpose of a speech of introduction is to __________.
A.
plain why the person being introduced is receiving her or his award
B.
spire the audience with a sense of the significance of the occasion
C.
eate a welcoming climate to build enthusiasm for the main speaker
D.
plain why listeners should pay tribute to a person, idea, or institution
【单选题】One main purpose of a speech of introduction is to
A.
explain why the person being introduced is receiving her or his award.
B.
inspire the audience with a sense of the significance of the occasion.
C.
create a welcoming climate to build enthusiasm for the main speaker.
D.
explain why listeners should pay tribute to a person, idea, or institution.
【单选题】The main purpose of telling the story of the cowboy is
A.
to show that one doesn't have to read books to acquire knowledge.
B.
to show that one should travel a lot to learn about the world.
C.
to show that nature can be a best textbook for us.
D.
to show that one should learn to love his country by travel.
【单选题】What is the main purpose of the passage? ______
A.
To argue for the superiority of one economic system.
B.
To explain the science of economics.
C.
To outline contrasting types of economic system.
D.
To find out the causes for a stagnant society.
【单选题】The main purpose of the last paragraph is to _____.
A.
argue in favor of one side on a particularly controversial topic of cloning.
B.
display both sides' arguments on another contentious issue in cloning.
C.
redirect the readers' attention to the previously raised issue of ethics in cloning.
D.
provide further relevant information to the evaluation of cloning as a preservation technique.
【单选题】某同学的以下行为中,不属于侵犯知识产权的是( )
A.
将购买的正版游戏上网到网盘中，共网友下载使用。
B.
把自己从音像店购买的《美妙生活》原版CD转录，然后传给同学试听。
C.
把从微软公司购买的原版Windows7系统光盘复制了一份备份，并提供给同学。
D.
下载了网络上的一个具有试用期限的软件，安装使用。
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