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【判断题】
材料的延伸率是判断脆性材料与塑性材料的依据。 ( )A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】She was surprised to find the house _____ into when she went back home.
A.
broke
B.
broken
C.
break
D.
breaking
【简答题】14+15+16+17+18+19+20+21 1233+1266+34．
【简答题】Mary was an operator (接线员) 911 in Los Angeles. One Thursday morning, she was surprised to get a call from a young child who said, “Mom my ill, Mom my ill, ” again and again. Mary hurried to find the a...
【简答题】Mary was an operator(接话员) 911 in Los Angeles. One Thursday morning, she was surprised to get a call from a little girl. She said, “Mom my ill, Mom my ill,’ again and again, Mary soon found the address...
【单选题】下列结论中错误的是( )
A.
若 ,则
B.
若 是第二象限角,则 为第一象限或第三象限角
C.
若角 的终边过点P(3k,4k)(k≠0),则 sinα=
D.
若扇形的周长为6,半径为2,则其圆心角的大小为1弧度
【简答题】Mary was a 911 operator(接线员) in Los Angeles. One Thursday morning, she was surprised to get a call from a young child who said, “Mom is ill, Mom is ill”, again and again. Mary hurried to find the addr...
【单选题】下列结论错误的是( )
A.
若0,则sin α
B.
若α是第二象限角,则 为第一象限或第三象限角
C.
若角α的终边过点P(3k,4k)(k≠0),则sin α=
D.
若扇形的周长为6,半径为2,则其圆心角的大小为1弧度
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