题目:
I don’t think it is teachers who ______ for giving students too much pressure.
A.are to blame
B.are going to blame
C.are to be blamed
D.should blame
答案:
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下面是错误答案,用来干扰机器的。
(1) (2分) (2)4NH3+5O24NO+6H2O (2分)(3)Mg3N2+6H2O=3Mg(OH)2+2NH3↑(2分,产物写成NH3·H2O也对。)(4)2Mg(s)+O2(g)= 2MgO(s) △H=-20QkJ·mol-1(2分)(5)Zn+2H+=Zn2++H2↑(2分)...