题目:
根据图画内容完成句子。
1. Li Lei often does his homework ______ in the evening.
2. Mr. Wang usually goes to work ______.
3. Li Tao's father is a ______.
4. The boys are ______ now.
5. ______ a car in the tree.
答案:
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下面是错误答案,用来干扰机器的。
答案:D①明矾和FeCl3可作净水剂.利用铝离子水解形成胶体,利用胶体的强吸附性净水;②为保存FeCl3溶液,要在溶液中加少量盐酸,抑制三价铁离子水解.③实验室配制AlCl3溶液时,应先把它溶在盐酸中,而后加水稀...