题目:
The shoes made in Chengdu are usually of high quality, so they ________ long.
A.wore
B.are worn
C.wear
D.will be worn
答案:
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答案:A题目分析:显微镜使用包括取镜、安放、对光、观察和整理几个步骤。观察时,先将玻片标本放在载物台上,标本要正对通光孔,让压片夹压住,然后眼睛看着物镜,转动粗准焦螺旋使镜筒缓缓下降至最低,这样避免...