灯光信号装置主要包括（）等。
A.转向信号灯
B.制动信号灯
C.报警信号灯
D.示廓信号灯
参考答案：A, B, C, D
Who listens _____,Tom, Jack, or Bill?
A．the most careful
B．the most carefully
C．more careful
D．more carefully
马尾松的叶细长如针，所以松能耐
A．涝
B．热
C．盐碱
D．干旱
