将下列液体分别与溴水混合并振荡，静置后分为两层，两层几乎均呈无色的是
A 氯水 B 己烯 C 苯 D 碘化钾溶液
答案：B
John promised his doctor he _____ not smoke, and he has not smoked ever since. [ ]
A. might
B. should
C. could
D. would
流体静压力的方向与作用面（）并指向作用面，流体内部任一点各个方向的静压力（）。
