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【单选题】
吸氧浓度为33％，每分钟氧流量为A.
1L/min
B.
2L／min
C.
3L／min
D.
4L/min
E.
5L／min
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【单选题】What have you learned about the time for telephone calls in many countries?
A.
People are not accustomed to making calls early in the morning.
B.
People would think something unpleasant must have happened if they receive a call early in the morning.
C.
People tend to think the call must be of vital importance if the telephone rings early in the day.
D.
People would feel annoyed if they receive a call while they’re shaving or having breakfast.
【单选题】For acceptable voice calls, the packet error rate should be no higher than what value?（）
A.
0.1%
B.
1%
C.
2.5%
D.
25%
【单选题】What have you leaned about the time for telephone calls in many countries?
A.
People are not accustomed to making calls early in the morning.
B.
Peole would think something unpleasant must have happened if they receive a call early in the moring.
C.
People tend to think the call must be of vital importance if the telephone rings early in the day.
D.
People would fell annoyed if they receive a call while they're shaving or having breakfast.
【单选题】The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. What is the cumulative relative freq...
A.
0.10
B.
0.59
C.
0.76
D.
0.84
【简答题】购入机器一台,价值50 000元,运杂费500元,款项以银行存款支付。
【简答题】An L/C calls for a copy of bill of lading. The period of presentation was 21 days from the date of shipment. If shipment is made on 01-01-2008, what is the latest date of the presentation. (1)( ) 29-...
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