黄色信号表示()。
A.停车
B.注意速度
C.注意或减低速度
D.按规定速度运行
参考答案:C
厨房所有设备的电源部分开关或插座应安在离地()左右的地方。
A.lm
B.1.5m
C.2m
D.1.8m
A ladder 25 feet long is leaning against a wall that is perpendicular to level ground. The bottom of the ladder is 7 feet from the base of the wall. If the top of the ladder slips down 4 feet, how many feet will the bottom of the ladder slip ?()
A.4
B.5
C.8
D.9
E.15