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【简答题】
整体承载结构包括：薄型材（单壳）结构、中空型材（双壳）结构和 。
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皮皮学刷刷变学霸
举一反三
【单选题】函数 的极值点为x=0.25 , 该点是极大值还是极小值及原因()。
A.
是极小值，因为它的二阶导数大于0
B.
是极小值，因为它的二阶导数小于0
C.
是极小值，因为它的二阶导数等于0
D.
是极大值，因为它的二阶导数小于0
【简答题】缺乏长远打算，导致一些短期行为出现的预算编制方法是增量预算法。()
【单选题】There is somebody at the door. ______ I go and see who it is? [ ]
A.
Shall
B.
Must
C.
Will
D.
Would
【单选题】There is somebody waiting for you, _________ I think might be one of your classmates.
A.
who
B.
whom
C.
which
D.
whoever
【单选题】— There is somebody at the door, who it be? Is it the postman? — No, it be him, it's just six o'clock. It's too early. [ ]
A.
may; can't
B.
may; mustn't
C.
will; won't
D.
must; may not
【单选题】There is somebody waiting for you______ I think might be one of your classmates. [ ]
A.
who
B.
whom
C.
whoever
D.
which
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