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【单选题】
关于摩擦力下列说法正确的是？A.
摩擦力的方向一定与物体运动方向相反
B.
摩擦力阻碍物体运动，所以说它总是阻力
C.
摩擦力既可作阻力，有时也可作动力
D.
经常用增大压力的方法来增大摩擦力
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【单选题】I decided to get in touch with him ______ after I received his letter.
A.
promptly
B.
quickly
C.
hastily
D.
urgently
【单选题】A man passing by sent me to a nearby hospital, and ______ his help, I received the medical treatment in time.
A.
according to
B.
regardless of
C.
along with
D.
thanks to
【简答题】A warm thought suddenly came to me____ I might substitute the hero to buy some flowers for his mother’s 60th birthday. A．if B．when C．that D．which
【单选题】Equity in a firm with no debt is called:
A.
levered equity.
B.
unlevered equity.
C.
riskless equity.
D.
risky equity.
【简答题】It wasn’t until a month later ____ I received his letter. A．that B．since C．when D．as
【单选题】The semantic holds that the meaning of a word______
A.
is interpreted through the mediation of concept.
B.
is related to the thing it refers to.
C.
is the idea associated with that word 'in the minds of speakers'.
D.
is the image it is represented in the mind.
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