小量不保留灌肠时肛管插入肛门约()
A.7—10cm
B.10—15cm
C.15—20cm
D.12—15cm
参考答案:B
We should try our best to do _____ work with _____ people. [ ]
A. more, less
B. less, less
C. fewer, fewer
D. more, fewer
有人说:“炸弹爆炸说明这一物体本身就具有力,不需要别的物体的作用.”这句话对吗?