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【单选题】
上消化道出血病人出现呕血,提示胃内积血量达到A.
100~150ml
B.
150~200m1
C.
250~300ml
D.
350~400ml
E.
450~500ml
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【单选题】Email,as well as telephones,________an important part in daily communication. [ ]
A.
is playing
B.
have played
C.
are playing
D.
play
【单选题】Email, as well as letters, ______an important part in daily communication.
A.
is playing
B.
are playing
C.
have played
D.
play
【单选题】已知某项目达产第一年的销售收入为31389万元，销售税金与附加为392万元，固定成本为10542万元，可变成本为9450万元，销售收入与成本费用均采用不含税价表示，则盈亏平衡生产利用率为（ ）。
A.
39．8%
B.
38．9%
C.
48．9%
D.
49．8%
【单选题】Identify the email address of the sender and ( ), as well as a subject and message.
A.
reciprocal
B.
reception
C.
receiver
D.
recipient
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