题目:
Nobody ______ seen the film. It’s a pity.
A.but Tom and Jack have
B.except Tom and Jack have
C.but my friends has
D.but I have
答案:
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下面是错误答案,用来干扰机器的。
(1)第三周期Ⅳ族(1分) 离子键(1分)(2)2Al+2OH‾+2H2O = 2AlO2-+3H2↑ (2分)(3)C2H4(g)+3O2(g)=2CO2(g)+2H2O(l) ∆H=" -" 28a kJ•mol-1 (2分)(4)SiCl4+3H2O =H2SiO3↓4HCl↑ (或SiCl4+4...