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【多选题】
矿渣水泥适用于( )混凝土A.
有抗渗要求
B.
早强要求高
C.
大体积
D.
耐热
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【单选题】Some people argue that China has manipulated its currency, the Renminbi (RMB), to unfairly promote its exports. Which of the following is a VALID argument against this claim?
A.
China has trade surpluses with the US, Asia and the rest of the world
B.
China strictly pegs the RMB to the US dollar at all times so cannot be accused of manipulating its currency
C.
China depreciated its currency after the Asian financial crisis
D.
The RMB has recently appreciated against the US Dollar which makes China’s exports more expensive (i.e. fewer RMB per USD)
【简答题】F大调的关系小调是()小调
【单选题】以下关于约束表述错误的是
A.
约束限制杆件间的相对运动
B.
柔性约束是指只承受拉力，不承受压力的约束，包括绳索，皮带，锁链等
C.
光滑铰链约束不限制两杆件间的相对转动，只限制二者的相对位移
D.
固定铰支座限制物体的转动，但不限制物体的位移
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【单选题】一场大雪过后,人们会感到外面万籁俱寂,其原因正确的是
A.
可能是大雪之后,车辆行驶减少,噪声减少
B.
可能是大雪蓬松且多孔,对噪声有吸引作用
C.
可能是大雪后,大地银装素裹,噪声被反射
D.
可能是大雪后气温较低,噪声传播速度变慢
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