车辆都配备照明装置和光信号装置，属光信号装置的是（）。
A、前小灯
B、后灯
C、前大灯
D、制动灯
参考答案：D
All the scientific evidence ________ that increasing use of chemicals in farming ________ damaging
our health. [ ]
A . show; are
B. shows; are
C. show; is
D. shows; is
光刻的作用是什么？
