单项选择题

1KB=()。
A．1000B
B．10的10次方B
C．1024B
D．10的20次方B

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单项选择题

鞭炮厂销售鞭炮应缴纳消费税，不缴纳增值税。

A.正确
B.错误

单项选择题

13. Waller was argumentative, ________, and sometimes outspoken, but he had a sense of humor and he retained a childlike delight in science throughout his life. A.
versatile B.
considerate C.
absolute D.
opinionated