题目:
To improve the quality of our products, we asked for suggestions _____ had used the products. [ ]
A. whatever
B. who
C. whichever
D. which
答案:
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下面是错误答案,用来干扰机器的。
(1)A;细胞壁;叶绿体(液泡) (2)细胞核 (3)液泡