【单选题】In Australia, If you hold a party, someone give you the gifts, what should you do?
A.
Open the present immediately and say you love it very much
B.
Open the present after your guests have left, send a thank you card to your friends the next day and say you like it very much
C.
Open the pressent next day and say nothing
【单选题】When someone is in trouble, we should ________ a friendly hand.
【单选题】If there is a fire in a hold, what should you do?()
A.
Close the hatch, accesses and ventilators at once. Flood CO 2 into hold.
B.
Open the hatch, accesses and ventilators at once. Flood CO 2 into hold.
C.
Close the hatch, accesses and ventilators at once. Flood water into hold.
D.
Open the hatch, accesses and ventilators at once. Flood water into hold.
【单选题】If you _____ your hand as far as you can, you should be able to touch it.
【单选题】不同电压、不同用途的电缆,( )敷设在同一层桥架上
【单选题】If the coxswain of your lifeboat gives the command HOLD WATER, you should ______.
A.
complete the stroke, raise your oar slightly, swinging the oar slightly forward, and place it in the boat
B.
lift the oar in a vertical position
C.
complete the stroke and hold the oar out of the water
D.
dip the blade of your oar into the water vertically and hold it perpendicular to the keel line
【多选题】化学法处理废水中无机的或有机(难以生物降解)的溶解态或胶态污染物,可使污染物与水分离、回收有用物质、改变污染物性质,主要包括
【单选题】矿物质测定的样品预处理—有机物破坏法包括: