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【单选题】
两块平玻璃构成空气劈尖,左边为棱边,用单色平行光垂直入射,若上面的平玻璃慢慢地向上平移,则干涉条纹A.
向棱边方向平移,条纹间隔变小
B.
向远离棱的方向平移,条纹间隔不变
C.
向棱边方向平移,条纹间隔变大
D.
向棱边方向平移,条纹间隔不变
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【单选题】You can see _______ tall trees and other plants in the thick forest.
A.
nothing but
B.
anything but
C.
something but
D.
everything but
【单选题】听力原文： Windbreaks are barriers formed by trees and other plants. Farmers plant these barriers around their fields to protect their land. Windbreaks stop the wind from blowing soil away (33) . They also...
A.
They can prevent soil from being blown away.
B.
They can improve the yield of crops.
C.
They can provide wood when cut down.
D.
They can protect crops from the strong sunshine.
【单选题】在使用word进行文字编辑时,下面叙述中错误的是
A.
word可将正在编辑的文档另存为一个纯文本(TXT)文件
B.
使用“文件”菜单中的“打开”可以打开一个已存在的word文档
C.
打印预览时,打印机必须是已经开启的
D.
word允许同时打开多个文档
【简答题】In the thick forest, you can walk from the edge till your feet ache, and still you'll see nothing ____ tall trees and other plants.
【单选题】James: ______. Jane: Maybe you should talk to him about it.
A.
It's driving me crazy.
B.
I can't stand his complaints.
C.
This film is boring.
D.
The book he lent me is tom,
【简答题】A fire clears away dead trees and plants on the floor of the forest, then new plants can grow.
【简答题】Plants are very important. This is because plants can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight. Animals can get their food by eating plants...
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