【单选题】家用电器或线路着火时,要先切断电源,再用干粉或哪种灭火器进行扑救。 ()
【判断题】当电器或线路着火时,要先切断电源,再用干粉或气体灭火器灭火,也可直接泼水灭火。()
【单选题】When turning the engine with turning gear, you should keep the indicator cocks _____.
A.
attached to the indicators
【简答题】电器或电源线路 着火 时,要先切断电源,再用干粉灭火或 灭火。
【判断题】某些蛋白质不仅可以作为阻遏蛋白还可以作为激活蛋白参与基因表达的调控。
【简答题】家用电器或线路着火时,要先切断电源,再用干粉或()灭火。
【单选题】-Remember! Keep all the secrets_______ me. -OK. I’ll keep them _______myself.
【简答题】龙门刨床上,工作台的往复直线运动实现切削的____________(主运动、进给运动);刀具(立刀架及侧刀架)实现切削的 (主运动、进给运动)。(注:填写时,两空答案用顿号隔开,以免电脑误判。)
【单选题】---The students of Class 7 are going to the seaside this weekend. ---Remember _____ them not to keep _______ alone in the sea. It’s dangerous.
【简答题】A) remember B) argue C) discuss D) keep