长期卧床患者可在身体空隙处垫海绵垫,使支持体重的面积__________________,从而降低骨隆突部位皮肤所受到的__________________。
参考答案:加大;压强
—Can you watch TV _____ school nights?
—Yes, but I have to be _____ bed _____ ten o'clock.[ ]
A. in; on; by
B. on; on; in
C. on, in; by
D. in; in; at
什么是产销差水量?它包括哪些水量?