激光的特点有（）
A.相干性好
B.方向性好
C.强度大
D.单色性好
E.贯穿本领好
参考答案：A, B, C, D
---Why are you so hot?
---I_______football with my classmates and how I want to have a drink!
A．was playing
B．have been playing
C．have played
D．played
纤维支气管镜检查的正确护理是
A．检查前2h开始禁食
B．检查时取侧卧位
C．检查后立即用朵贝尔溶液漱口
D．检查后即可进食
E．检查后鼓励轻咳
