化学物质的那些物理性质影响毒效应（）
A.电离度
B.熔点
C.挥发度
D.以上都是
参考答案：D
— How often do you eat out?
— _________, but usually once a week. [ ]
A. Have no idea
B. It depends
C. As usual
D. Generally speaking
CT扫描有哪些注意事项?
