夜间作业时,自行式铲运机的前后照明应齐全完好,前大灯应能照至( )。
A.20mB.24mC.28mD.30m
参考答案:D
--- Mum, I’m starving! Can I have something ?
--- Oh, dear. You can only drink some milk. There is in the fridge.
A.to drink; nothing else
B.drinking; something else
C.to eat; nothing else
D.eating; something else
下列液体不能导电的是
A.澄清石灰水
B.氢氧化钡溶液
C.乙醇
D.稀硫酸