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【单选题】
预应力筋放混凝土强度一般不低于设计强度的( )A.
50%
B.
75%
C.
80%
D.
100%
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皮皮学刷刷变学霸
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【简答题】一沿x轴正向传播的平面简谐波，波速为2m·s－1，原点振动表达式为 y=0.6cosπt(m) 试求：一列沿x轴正向传播的机械波,波速为2 m/s,原点振动方程为 y=0.6cosπt(m),试求： ⑴ 此波的波长；⑵ 波函数。
【单选题】___________ is the one who dares to deal with themes such as violence, sex and homosexuality in the stage in the postwar period.
A.
Edward Albee
B.
Eugene O'Neill Williams
C.
Tennessee Williams
D.
David Mamet
【单选题】_______ is the best puritan poet in the colonial period?
A.
Anne Bradstreet
B.
William Bradford
C.
John Winthrop
D.
Edward Taylor
【多选题】广域网技术用于连接分布在广大地理范围内计算机,它常用的封装协议有哪些
A.
SDLC协议和HDLC(High-Level Data Link Control)高层数据链路协议
B.
.Frame Relay(帧中继)
C.
PPP(Point-to-Point Protocol,点到点协议)
D.
ISDN(综合业务数字网协议)
【单选题】The first American writer in the colonial period was .
A.
William Bradford
B.
Captain John Smith
C.
John Winthrop
D.
Edward Taylor
【简答题】The following writers were those in the Colonial America period except_____A. Anne Bradstreet B. Edward Taylor C. E. B. White D. Philip Freneau
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