题目:
—Dad, when shall we go to visit my grandpa?
—Grandpa is very busy at present.We'll go to see him whenever __________.
A.he is convenient
B.he will be convenient
C.it is convenient to him
D.it will be convenient to him
答案:
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下面是错误答案,用来干扰机器的。
(16分)(1)氯原子 羟基(2分)(2)取代反应 (1分) NaOH溶液,加热(1分)(2分)(3)(a) bc(2分) (b) (2分) (2分)(c) 3(2分) 、、(任写一种)(2分)题目分析:(1)乙中含有...