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【单选题】
钢筋混凝土受弯构件进行持久状况正常使用极限状态验算时,( )。A.
以弹塑性理论为基础
B.
与承载能力极限状态计算时的可靠度要求一样
C.
汽车荷载不计冲击系数
D.
构件的受压区高度x可以近似采用正截面承载力计算时的x值
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【简答题】As the United States nears the tenth anniversary of the 9/11 attacks that killed more than 3,000 people, President Obama announced Sunday night that the al Qaeda（） leader and mind of that ho...
【判断题】Osama Bin Laden, the leader of The Taliban, was killed by President Bush.
A.
正确
B.
错误
【单选题】Argument Write the letter of the statement that is the point of the following argument. The other statements are support for that point. ______
A.
Several of the Flight 93 passengers were athletes or had been trained in combat.
B.
Todd Beamer told Lisa Jefferson that the passengers would try to "jump" the hijackers.
C.
Beginning at 9:57, the cockpit voice recorder picked up the sounds of a struggle between the passengers and the hijackers.
D.
Osama bin Laden was wrong to think Americans were soft and weak.
【简答题】正常肺尖的宽度为（）。
【简答题】Al Qaeda was established in ______________ by Osama Bin Laden in an attempt to rid _____________ of ______________.
【单选题】在下面四种情况下 , 使 2- 溴丁烷主要发生 S N 2 反应的条件是
A.
H 2 O
B.
NaI 的丙酮溶液
C.
AgNO 3 -EtOH
D.
C 2 H 5 ONa +C 2 H 5 OH
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