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问题 单项选择题

JD-1A型计算机联锁系统中，对于一个联锁机柜的最后一个机箱，必需插一块（）板，实现整个外部控制总线的阻抗匹配。

A.控制总线

B.计算机总线

C.总线匹配

答案

参考答案：C

句型转换

将下列句子改为感叹句。

1. It is a busy day. (how)

                                                                                          

2. The weather is very bad. (what)

                                                                                           

3. You cooked nice food. (how)

                                                                                         _

4. The water here is very clean. (what)

                                                                                           

5. This kind of car is too expensive. (how)

                                                                                  ____

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多项选择题

生活污水塑料管道直径160度的标准坡度不正确的是（）。

A.4‰

B.5‰

C.6‰

D.7‰

E.8‰
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