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【单选题】
两个力偶等效的条件是( )。A.
力偶矩相等
B.
力偶臂相等
C.
两力偶的力相等
D.
力偶矩相等转向相同
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皮皮学刷刷变学霸
举一反三
【单选题】The serious earthquake ________ many deaths of people in Haiti.
A.
resulted in
B.
resulted from
C.
as a result of
D.
as a result
【单选题】Haiti is at risk for a big earthquake because
A.
Haiti is part of Hispaniola which has a fault line.
B.
there is a fault line that runs along the southern side of Haiti.
C.
there is a fault line along the western side of Haiti.
D.
Haiti is located in the Western Hemisphere.
【多选题】以下说法错误的是________。
A.
空隙率是指材料内孔隙率体积占总体积的比例
B.
空隙率的大小反映了散粒材料的颗粒互相填充的致密程度
C.
空隙率的大小直接反映了材料内部的致密程度
D.
孔隙率是指材料内孔隙体积占总体积的比例
【简答题】管道连接常用的填压材料有哪些?
【多选题】以下说法错误的是( )。
A.
空隙率是指材料内孔隙体积占总体积的比例
B.
空隙率的大小反映了散粒材料的颗粒互相填充的致密程度
C.
空隙率的大小直接反映了材料内部的致密程度
D.
孔隙率是指材料内孔隙体积占总体积的比例
【单选题】With aid across the world, the brave Haiti people are sure to _____ the problems caused by the mass earthquake. [ ]
A.
break down
B.
get off
C.
break off
D.
get over
【单选题】The Haiti tragedy represents an opportunity for President Obama to show how an ____ foreign policy can result n the building of Haiti in the right way through international cooperation and, most impor...
A.
expensive
B.
exclusive
C.
inclusive
D.
intensive
【单选题】Apart from the shortage of water and food, the survivors in Haiti are _______the terrible plague (瘟疫). [ ]
A.
in search of
B.
in charge of
C.
at the mercy of
D.
as a result of
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