若从溴水中把溴萃取出来，可选用的萃取剂是 [ ]
A．水
B．无水酒精
C．四氯化碳
D．氢氧化钠溶液
答案：C
单句改错：找出错误并加以改正。
1. With the exam holding tomorrow, I can'tgo shopping with you.
2. Don't speak with your mouth fully.
恶热、胸闷、腹痛、呕恶、无汗，见于
A．暑闭心神
B．暑闭气机
C．暑湿袭表
D．热人心包
