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【单选题】
进行拉伸试验测量试样断裂伸长率及屈服伸长率时，必须使用（ ），并且它的上下夹头分别固定试样的标距线上。A.
拉伸夹具
B.
引伸计
C.
横梁
D.
弯曲夹具
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】The relationship between internal force and stress is that
A.
The internal force is smaller than the stress.
B.
The internal force is the algebraic summation of the stress.
C.
The internal force is a vector and the stress is a scalar.
D.
The stress is the internal force per unit area.
【简答题】阅读理解。 Basketball players are usually very tall. Because they need to put the ball into the basket. Other sports players may be shorter than them. Short people often have better balance than tall peop...
【简答题】Here are the table tennis players , some____ ____are our old friends.(介词加关系词)
【单选题】They all believed that internal peace and stability cannot be _______ by force.
A.
protected
B.
guaranteed
C.
preserved
D.
ensured
【判断题】The internal force concentration caused by internal force is called stress.
A.
正确
B.
错误
【简答题】Here are the table tennis players, some __ _____ are our old friends.
【单选题】听力原文： Tennis is an international sport and each year there is a regular program of tournaments and championships. Players' performance in these events determines their seeding, or world ranking. If yo...
A.
The Hopman Cup.
B.
The Masters Series.
C.
The Wimbledon Championships.
D.
The ATP Tour.
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