直径为100孔键宽为28的键槽深度为6.4,100孔径的公差为?
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人眼中的晶状体相当于______,眼球后的视网膜相当于光屏,人眼看物体时,在视网膜上形成______、缩小、______像.
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Australia is in the south of the earth so the seasons there are the opposite of .
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I want to go to China's Space Museum. (改为同义句)
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The earthquake hit the city in 1906. It was the biggest in American history. (将句子连接为定语从句)
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整个教室有一种不平常的________(庄严 严肃 肃穆)的气氛。
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