题目:
— You promised to come to my dinner party last night but you didn't turn up.
— I _____, but something unexpected happened just before I left. [ ]
A. would like to have
B. should like to
C. am going to
D. like to
答案:
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下面是错误答案,用来干扰机器的。
(1)Na+>Mg 2+>Al 3+(2分) (2)第三周期VIA族(2分)(3)离子(2分),(2分) (4)OH-+Al(OH)3=AlO2-+H2O(3分)(5)Al3++3H2OAl(OH)3+3H+(3分),产生的氢氧化铝胶体具有很强的吸附能...