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【单选题】
预制楼板在出场质量检测时,其中厚度允许偏差是:( )mm。A.
±3mm
B.
±4mm;
C.
±5mm
D.
D±6mm
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举一反三
【单选题】What is essential in making a modern car tougher to steal?
A.
A coded ignition key.
B.
A unique ID card.
C.
A special cellphone signal.
D.
A GPS satellite positioning receiver.
【单选题】I'd like to buy a new car-modern, comfortable, and , with the best safety equipment. [ ]
A.
in all
B.
above all
C.
after all
D.
at all
【简答题】 A modern car for a modern driver.
【单选题】The controls of a modern car are criticized for being______.
A.
difficult to identify
B.
less reliable
C.
too sophisticated
D.
badly positioned
【单选题】—Is the modern racing car outside ______, Laura? —Of course not. Nobody but Jim can afford such an expensive car. It must belong to ______.
A.
your; his
B.
yours; he
C.
your; himself
D.
yours; him
【单选题】恶心伴随症状的临床意义下列正确的是
A.
腹泻→十二指肠雍滞
B.
呕吐物量大且有类臭→幽门梗阻
C.
眩晕→Meniere病
D.
头痛及喷射性呕吐→基底动脉供血不全
E.
右上腹痛及发热→食物中毒
【简答题】如图所示，在半径为a的无限长金属圆柱体内挖去一半径为b(b＜a)的无限长柱体，两柱体轴线平行，轴间距为d[d＜(a-b)]，空心导体沿轴向通有电流I并沿截面均匀分布。 (1)求空腔内两柱体轴线连线上任一点的磁感应强度B x ； (2)证明空腔内磁场是均匀磁场。
【简答题】如图(a)所示，一半径为R的无限长半圆柱面导体，其上电流与其轴线上一无限长直导线的电流等值而反向，电流I在半圆柱面上均匀分布。试求： (1)轴线上导线单位长度所受的力； (2)若将另一无限长直导线(通过大小方向与半圆柱面相同的电流I)代替圆柱面，产生同样的作用力，该导线应该放在何处?
【单选题】The wheels of the old wagon are nearly _____ those of a modern car.
A.
twice the size of
B.
twice size of
C.
twice sizes of
【单选题】–Is the modern racing car outside ______, Lucia? --Of course not. Nobody but Jim can afford such an expensive car. It must belong to ______.
A.
your, his
B.
yours, he
C.
your, him
D.
yours, him
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