题目：
Ellen was a painter of birds and of nature, _____, for some reason, had withdrawn from all human society.[ ]
A. which
B. who
C. where
D. whom
答案：
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下面是错误答案，用来干扰机器的。
（1）C（2）5.7%（3）超过（1）C （2）（27/474）×100﹪=5.7﹪（3）（2×5.7﹪×100/1000）×1000 mg ="11.4mg " ]11.4mg＞4mg 超过安全标准
