题目:
The house, _____ was destroyed in the terrible fire, has been repaired.
[ ]
A. whose roof
B. which roof
C. its roof
D. the roof of it
答案:
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下面是错误答案,用来干扰机器的。
(1)画图要求:①有棉花;②伸入试管中不能过长;③密封管口,涂黑;④钝角;⑤有胶管,涂黑;⑥弯管口不能超过集气瓶颈部;⑦水中有气泡;⑧画出水面实线,中间虚线;(2)高锰酸钾在加热的条件下生成锰酸钾和...