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【单选题】
If you don't keep the meal in the refrigerator on such a hot day, it may ____。 [ ]A.
go out
B.
go away
C.
go off
D.
go down
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【简答题】Wei Hua may be on the team. or Ann may. ______ Wei Hua ______ Ann may be on the team.
【简答题】The reaction,A+2B→C+2D,is run three times. In the second run, the initial concentration of A is double that in the first run,and the initial rate of the reaction is double that of the first run. In th...
【单选题】A . It is stable. B . It is durable. C . It is inexpensive. D . It is sophisticated.
A.
B.
C.
【多选题】2What is the difference between D/P and D/A?
A.
D/P is much safer for the seller than D/A
B.
D/P after sight and D/A both adopt the draft.
C.
D/P belongs to collection but D/A can be remittance.
D.
D/P can be sight payment while D/A is only time payment.
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