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【简答题】
图示平面结构,自重不计,C处为光滑铰链。已知:P1=100KN,P2=50KN,θ=60°,q=50KN/m,L=4m。试求固定端A的反力。
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反馈参考答案：
举一反三
【简答题】某生物有四对同源染色体,在减数分裂中能形成( )个二价体和( )条染色体。
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A.
Liz has tried unsuccessfully to phone Bill.
B.
Liz is asking John to phone Bill.
C.
Liz has been too busy to phone Bill.
【单选题】【D3】 LIZ: GEEZ! YOUR ROOM IS LIKE AN ICE-BOX! TERRI:【D1】______IT' S JUST COMFORTABL E. LIZ: YEAH, IF YOU' RE A PENGUI N. JUST LOOK AT ME! 【D2】______ TERRI: BUT YOU DON' T HAVE TO STAY HER E. I THINK Y...
B.
BY THE DOOR, ON THE WALL.
C.
I'M SHAKING ALL OVER.
D.
NO, IT'S NOT!
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【简答题】某生物有四对同源染色体,在减数分裂中能形成 个二价体和 条染色单体。
【单选题】听力原文：M: Susan, could you do me a favor? W: What is it, John? You will ask for a leave from Professor Li's class again? M: No, no. This is easy compared to that. My cousin is coming on Thursday. She ha...
A.
He will meet her cousin sister at the station.
B.
He will ask for a leave from the class.
C.
He will have an interview.
D.
He will be on duty at the library.
【简答题】经典条件反射认为,无条件刺激会引起__________,如果一个中性刺激与无条件刺激总是联系在一起,那么,以后不出现无条件刺激也会引起个体__________。
【简答题】根据课文内容， 完成下列句子，每空词数不限。 Liz Smith Liz Smith faces many challenges in her daily life because she is a (1) _________ person. Liz Smith can't use her (2) _________ well, so normal things have always been...
【单选题】经典条件反射认为，无条件刺激会引起（ ），如果其中一个中性刺激与无条件刺激总是联系在一起的，那么，以后不出现无条件刺激也会引起个体（ ）。
A.
无条件反应 条件反应
B.
无条件反应 无条件反应
C.
条件反应 无条件反应
D.
条件反应 条件反应
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