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【单选题】
Dogs who accompany blind people must learn______.A.
to obey all orders
B.
to obey only safe orders
C.
never to cross busy roads
D.
to cross roads when commanded
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举一反三
【简答题】《好雪片片》一文中写作者第一次买奖券的事,运用了那些描写方法?
【单选题】Too much work and no time for rest is a ( ) on him both physically and mentally.
A.
deposit
B.
burden
C.
cover
D.
revolution
【单选题】伏尔泰曾写道：“如果全部自然界，一切行星都要服从永恒的规律，而有一个小动物，五尺来高，都可以不把这些定律放在眼中，完全任意地为所欲为，那就太奇怪了。”这段材料反映了伏尔泰的主旨是（）
A.
抨击封建神学的自大心理
B.
把自然科学从神学束缚中解放出来
C.
认为人类社会有客观法则
D.
自然界有其特殊的运行规律
【单选题】The gold standard had limited liquidity (paragraph 2) most probably because
A.
the money supply could grow no faster than the supply of gold.
B.
it was impossible to convert the currency of one country into that of another.
C.
the money supply varied independently of the gold supply.
D.
a nation's currency could not be freely converted into gold.
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