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【单选题】
21) In an open economy under flexible exchange rates, a reduction in consumer confidence that causes a reduction in consumption will cause which of the following?A.
a reduction in net exports
B.
a reduction in the exchange rate, E
C.
an appreciation of the domestic currency
D.
all of the above
E.
none of the above
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【单选题】关于髓腔的描述下列哪项是错误的（）。
A.
青少年恒牙的髓腔比老年人大
B.
下颌第一二磨牙颊侧髓角较舌侧髓角高
C.
青少年恒牙的髓角高，制备洞型时容易穿髓
D.
老年人有时发生髓腔部分或全部钙化堵塞
E.
按牙体比例而言，乳牙髓腔较恒牙为大
【单选题】According to the passage, which of the following is true of the Rosetta stone?
A.
It was found by scholars trying to decode ancient languages.
B.
It contains two versions of hieroglyphic script.
C.
Several of its inscriptions were decoded within a few months of its discovery.
D.
Most of its inscriptions have still not been decoded.
【单选题】The plane will at three o’clock in the afternoon.
A.
take off
B.
take away
C.
take out
【单选题】The plane will take off at 6:00 pm, so I have to be at the airport 4:00 pm at the latest.
A.
after
B.
until
C.
since
D.
by
【单选题】关于下颌第一恒磨牙下列哪项是错误的
A.
多分为两根,即近中根和远中根
B.
两根的颊舌径较大彼此平行略向远中弯曲
C.
有时可分为三根,即远中根分为远中颊根及远中舌根
D.
患牙牢固时,可先用牙挺以颊舌侧骨板为支点挺松后再拔除
E.
拔除时以颊舌向摇动为主,最后向颊侧脱位
【单选题】According to the paragraph 6, which of the following is true of carotene?
A.
They can be found in green vegetables.
B.
They are found in all animal livers and dairy products.
C.
They convert into vitamin A once consumed.
D.
They are chemical substances human body needs in order to survive.
【简答题】The plane will
in five minutes.
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