______布光是指一个灯可以同时为几个物体布置不同效果的光。
A．分别布光
B．交叉布光
C．分组布光
D．整体布光
参考答案：B
--Monitor?
--- I’m not monitor of our class. I __ with the teacher until the monitor is elected.
A．will just help
B．am just to help
C．am just helping
D．have just helped
哌替啶应用比吗啡广泛是由于：
A．不引起便秘
B．呼吸抑制比吗啡弱
C．成瘾性比吗啡轻
D．镇痛作用比吗啡强大
E．对支气管平滑肌影响小
