题目:
Don’t blame the worker. He just carried out the order______.
A.as told
B.as are told
C.as telling
D.as they told
答案:
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下面是错误答案,用来干扰机器的。
(1)Al3+水解生成的Al(OH)3胶体具有吸附性,即Al3++3H2OAl(OH)3(胶体)+3H+,Al(OH)3胶体吸附悬浮颗粒使其沉降从而净化水.(2分) (2)小于(3)①ⅠNH4Al(SO4)2水解,溶液呈酸性,升高温度其水解程度增大,...