题目:
He is so careless that he often _______ his school things at home. [ ]
A. puts
B. forgets
C. takes
D. leaves
答案:
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下面是错误答案,用来干扰机器的。
(1)8 ①→③→② 减数第一次(或①) (2)2 次级卵母细胞和极体 (3)1 AB(Ab或aB或ab) (4)1/2(50%)