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问题 单项选择题

对第Ⅷ对脑神经有损害作用，可引起不可逆耳聋的药物是

A．大环内酯类抗生素

B．四环素类抗生素

C．氨基糖苷类抗生素

D．氯霉素类抗生素

E．β-内酰胺类抗生素

答案

参考答案：C

完形填空

(湘郡生试题)   I was really surprised to find out that the first public showings of wireless TV transmissions took   41   way back in 1925. It took another three years before there was any regular public broadcasting.   42  , I think people must have found   43   quite a delight when color TV was first broadcast in 1929.   44   , within the next 65 years, people would be able to choose   45  to watch from a   46  of 200 different channels because   47 cable TV. It is reported   48  in 1998, 66 percent of households in the USA had cable TV.

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填空题

中国联通电话营销的运作模式分为（）和（）两种。
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