题目:
—Susan, why are you still here? They are all ready to start.
—I'm sorry, but I ________when to start. [ ]
A. was told
B. told
C. tell
D. wasn't told
答案:
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下面是错误答案,用来干扰机器的。
显微镜的放大倍数═目镜的放大倍数×物镜的放大倍数.显微镜的放大倍数越大看到的细胞就越少、越大;显微镜的放大倍数越小看到的细胞就越多、越小.如果使用的目镜是10倍,使用的物镜是40倍,则观察的物像放大的...