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【单选题】
假定价格水平为1.0时社会需要1000亿元货币从事交易；当价格水平为0.8时，为了维持同样规模的交易量，则社会需要的从事交易的货币量为（）A.
800亿
B.
1250亿
C.
1000亿
D.
1800亿
E.
不确定值
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参考解析：
知识点：
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【单选题】男性，32岁，今日中午突然呕血150 ml，继而排黑便2次，共约400 ml。查体：剑突下轻压痛，肝脾未触及。上消化道出血的原因可能为
A.
胃癌
B.
消化性溃疡
C.
应激性溃疡
D.
慢性胃炎
E.
食道静脉曲张破裂
【单选题】After discussion, we all think it’s an idea that’s worth _____.A．consideringB．to considerC．to be
A.
19. After discussion, we all think it’s an idea that’s worth _____. A．considering
B.
to consider
C.
to be considered
D.
of considering
【单选题】男性，32岁，今日中午突然呕血150ml，继而排黑便2次，共约400ml。查：剑下轻压痛，肝脾未触及。上消化道出血的原因可能为
A.
应激性溃疡
B.
消化性溃疡
C.
胃癌
D.
慢性胃炎
E.
食道静脉曲张破裂
【单选题】We confirm _______ your order No. 7891 dated May 10, 1990.
A.
to have received
B.
having received
C.
receiving
D.
to receive
【单选题】As soon as we got to the airport, we found that the plane_____.
A.
had already taken off
B.
already took off
C.
was already taking off
D.
was already taken off
【单选题】男性，32岁，今日中午突然呕血150ml，继而排黑便2次，共约400ml。查：剑下轻压痛，肝脾未触及。上消化道出血的原因可能为
A.
应激性溃疡
B.
胃癌
C.
消化性溃疡
D.
慢性胃炎
【简答题】– We ordered 20boxes of your products, but we have only got 19. – .A. You do not have to B. It doesnot matter C. We will send another tomorrow D. Would you mind calling back later?
【单选题】–We ordered 20 boxes of your products, but we have only got 19.
A.
You do not have to
B.
It does not matter
C.
. We will send another tomorrow
D.
Would you mind calling back later?
相关题目：
【单选题】男性，32岁，今日中午突然呕血150ml，继而排黑便2次，共约400ml。查：剑下轻压痛，肝脾未触及。上消化道出血的原因可能为
A.
应激性溃疡
B.
胃癌
C.
消化性溃疡
D.
慢性胃炎