《技规》(普铁)第411条规定:遮断、遮断预告、复示信号机以()为定位。
A.白灯
B.无显示
C.红灯
参考答案:B
Look and wrile.(着图片.给下列各图选择正确的词组并写在横线上)
do homework have English lessons get up eat dinner
go to school do morn_ing exercises eat breakfast play sports
1.______ 2.______ 3.______ 4._____
5._____ 6._____ 7._____ 8._____
简述小麦锈病的综合防治措施。