题目内容

When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.

A. 8:00 p.m.
B. 10:00 p.m.
C. 7:00 p.m.
D. 9:00 p.m.

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更多问题

When you buy something and pay for it with bills or coins, you are paying 1___. If you don’t have a2_of bills and coins that exactly equals the price of the item, you may give the salesperson too much money. He or she will then give some money 3 you. The money you get back is called change. Look at this example.Your husband is buying a color4_. The total price is $244.90. He gives the salesman $250.00—two hundred-dollar bills and one fifty-dollar bill. The salesman gives him back a 5___and a dime. Your husband’s change is $5.10.

多级放大电路的放大倍数是每一级放大电路放大倍数的乘积（带负载时）。

A. 对
B. 错

何谓群桩效应？什么情况下须考虑群桩效应？

A "surprise" journey may bring us a mixture of feelings. Now listen to a passge and match the information.