吸入下列哪种毒物可引起"电击样"死亡A．甲苯 B．氰化氢 C．氯乙烯 D．一氧化碳

句型转换。

1. I asked, "What does Jim's father wear at the office?" (合并成一句)

    I asked ________________________________.

2. You'd better wear tight pants. (改为否定句)

    You'd better ____ ____ tight pants.

3. You should knock at the door before you enter someone's room. (改为同义句)

    You should knock at the door before you ____ ____ someone's room.

4. It is important that you study English well. (改为同义句)

    It is important ____ ____ to study English well.

5. Could you tell me how I can find out the information? (改为同义句)

    Could you tell me ____ ____ find out the information?

票据和结算凭证金额以中文大写和阿拉伯数码同时记载，二者必须一致，二者不一致的票据无效；二者不一致的结算凭证，银行不予受理。（）

大肠杆菌DNA连接酶要求（）的参与，哺乳动物的DNA连接酶要求（）参与。

X62W万能铣床左右进给手柄搬向右，工作台向右进给时，上下.前后进给手柄必须处于（）

A、上

B、后

C、零位

D、任意位置

在移动通信的发展趋势中，无线接入网引入了HSDPA的阶段是（）。

A、GSM/GPRS

B、3GPP R99

C、3GPP R4

D、3GPP R5/R6