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【简答题】
完形填空。 When  you are going to leam English, you  should  first  pay  attention  to listening  and  speaking. It's  the groundwork(基础)  of  reading and  writing. You'd better l your best to speak while you are doing much listening. Don't be 2 0f making mistakes. But be careful not to let them stop you from improving your _ 3   . While you are doing this, a good 4 is to keep a diary, write notes or letters.Then if you can, asksome others to go though 5 you have written and they will tell you where it is wrong.Many mistakes in your speaking will be 6 found when you write. Through correcting mistakes, you can do better in learning English. If you are slow in speaking, don't 7 about it.  One of the helpful ways is to read-read aloud or read to yourself.  The important thing is to choos 8 interesting to read, and it mustn't be too difficult for you.  When you are reading 9 this way, don't stop to _10 the new words if you can guess their meanings or when they don't have anything to do with the sentences. But you can do that at some other time. (     )1.A. have (     )2.A. sure (     )3.A. English (     )4.A. start (     )5.A.how (     )6.A.happily (     )7.A.talk (     )8.A.something (     )9.A.by (     )10.A.look at B. send B. proud B. Chinese B. idea B.when B.easily B.fear B.everything B.on B.look for C. make C. afraid C. Japanese C. time C.what C.really C.worry C.anything C.at C.look up D. try D. tired D. French D. way D.why D.slowly D.hurry D.nothing D.in D.look over
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【判断题】两点透视也称成角透视,两点透视是物体与画面形成一定的角度,物体的各个平行面朝不同的两个方向消失在视平线上,画面上有左右两个消失点的透视形式。由于较之一点透视多了一个透视面,所以,两点透视显得更加自然、活跃,是绘画表现中运用得最广的一种透视类型。
A.
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B.
错误
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A.
调制解调
B.
脉码调制
C.
曼切斯特编码
D.
调频
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A.
正确
B.
错误
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A.
正确
B.
错误
【简答题】工件可近似地看成(),要使工件在某个方向有确定位置,就必须限制该方向的自由度。如果要使一六方体工件在空间处于唯一确定的位置,可在三个相互垂直的平面上,用()来限制工件的全部自由度,上述确定工件唯一确切位置的规则,就称为六点定位规则。
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A.
280°
B.
π
C.
80°
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【单选题】一个点在平面上有( )个自由度。
A.
B.
C.
D.
【简答题】一个点在平面上有()个自由度。
【单选题】一个点在平面上有()自由度。
A.
1
B.
2
C.
3
D.
4
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