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【单选题】
Economists use the term marginal utility to mean______.A.
additional satisfaction gained divided by additional cost of the last unit
B.
total satisfaction gained when consuming a given number of units
C.
additional satisfaction gained by the consumption of one more unit of a good
D.
the process of comparing marginal units of all goods which could be purchased
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【简答题】将几个命题联结起来,形成一个复合命题的逻辑联结词主要有____ 、____ 、____ 、____和____ 。
【单选题】While some international couriers are showing signs of exhaustion, EMS (Express Mail Service), the generic name for the courier services of post offices, seems to be finding its stride. Known as Datap...
A.
problems of post offices in Britain
B.
the new courier service — EMS
C.
the competition between private and international courier services
D.
differences between EMS and DHL
【简答题】EMS-express mail serviceA. 邮政快递
【单选题】Today’s postal service is more efficient than ever. Mail that once took months to move by horse and foot now moves around the country in days or hours by truck, train, and plane. If your letter or pac...
A.
more people use the post office for urgent deliveries than any other delivery service.
B.
Express Mail is a good way to send urgent mail.
C.
Priority Mail usually takes two days or less.
D.
mail service today is more effective and dependable.
E.
mail was once delivered by horse and foot.
【单选题】While some international couriers are showing signs of exhaustion, EMS (Express Mail Service), the generic name for the courier services of post offices, seems to be finding its stride. Known as Datap...
A.
problems of post offices in Britain
B.
the new courier service—EMS
C.
the competition between private and international courier services
D.
differences between EMS and DHL
【单选题】非最终灭菌口服液体药品的暴露工序，其生产洁净区的洁净级别要求为
A.
100级洁净区
B.
1000级洁净
C.
10000级洁净
D.
100000级洁净
E.
300000级洁净 《药品生产质量管理规范附录》规定
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