硼砂饱和溶液中添加甘油会产生什么结果
A．产生浑浊沉淀
B．pH上升
C．不相溶的两个液层
D．pH下降
E．仅仅是浓度降低
参考答案：D
完成句子。
1. — Are you still thinking about yesterday's game?
— Oh, that's _____ (让我激动的事).
2. I wonder _____ (我们能做点什么) about it.
3. _____ (他不能明白的是) was why fewer and fewer students showed interest in his lessons.
4. Mary wrote an article on _____ (为什么这个队没赢得比赛).
5. The problem is _____ (谁要来帮助我们).
80岁以上老人肾单位的数目是20岁年轻人的
A．3／4
B．1／2
C．1／3
D．1／4
E．1／5
