饮留积的部位多为：（）
A、肠
B、胸胁
C、胃
D、胸膈
E、肌肤
参考答案：A, B, C, D, E
Kangkang likes watching TV, but his mother doesn't let him _____ TV on school days. [ ]
A. watching
B. watch
C. watches
D. watched
转子流量计是以压降不变，利用（）的变化来反映流量大小。
A、节流体积
B、节流面积
C、节流压力
D、节流介质
