题目：
— I feel _____a pity that I haven't been to the get together.
— You really should have.
[ ]
A. them
B. one
C. that
D. it
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ⅦA族(2)HClO4＞HNO3＞H2CO3(3)＜ Al3＋＋3H2OAl(OH)3＋3H＋(4)Al3＋＋3NH3·H2O=Al(OH)3↓＋3NH4+(5)CH4(g)＋2O2(g)=CO2(g)＋2H2O(l) ΔH＝－890．3 kJ/mol由题意推出X为N元素，Y为C元素...
