一个细菌每10分钟繁殖一代，经1小时将会有多少个细菌：（）
A、64
B、32
C、9
D、1
参考答案：A
固定拨号上网业务（）手机号码只能对应一个上网帐号。
We have received orders ______ USD 1,000,000 since the new product was introduced to the market.
A．amount for B．amount toC．account for D．amounting to
