建筑高度超过32m的高层汽车库的室内疏散楼梯采用（）。 A.封闭_爱下问搜题

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问题单项选择题

建筑高度超过32m的高层汽车库的室内疏散楼梯采用（）。

A.封闭楼梯间

B.敞开楼梯间

C.室外楼梯间

D.防烟楼梯间

答案

参考答案：D

解答题

1米长的绳子用去30%后，还剩70%米．______．

完形填空

If you are writing or studying, it makes much difference where the light comes from. People use        and pens every day. They have to be very careful about the way of the light because the light shines on their work.
Every        gets its light either from daylight        the window        from the lamps or electricity,        no matter what kind of light it is, the way it shines towards our books or work is very important to the eyes.
Take a book and sit with your        toward the window, and try to read. Your shadow(影子) falls all over the page and makes it        for your eyes as if you were in a        room.
Now turn around and face the window. The page is        shadow again, while the bright light is in your eyes.
Try sitting with your        side toward the window. This is very good for        , but if you were writing, the shadow        fall across the page and bother you        .
There is another way – sit        your left side to the window. Now everything is perfect for writing as well.
Whatever kind of light is in the room, the rule about the right way to sit is        the same.