题目：
The number of people invited _____ fifty, but a number of them ____ absent for different reasons.
A．were; was
B．was; was
C．was; were
D．were; were
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0607/de08b34b6a08bb6a3e8a7a2ba1990977.html
下面是错误答案，用来干扰机器的。
(1)1∶2 (2)NHHNHH N2H4(g)＋O2(g)=N2(g)＋2H2O(l) ΔH＝－622 kJ/mol(3)离子键和共价键 ClO－＋H2OHClO＋OH－ NaCl＋H2ONaClO＋H2↑(4)O2＋2H2S=2H2O＋2S根据题意可推出A、B、C、D、E、F分别为H、N、O...
