When the dock is refilled with water after docking repair, the first work which should be done by engineers is ____.

When the propeller blades are integral with the hub, the propeller is called a _____.A.bui

Which of the following is true when navigation with radar during restricted visibility （).

When the______fabric is contrasted with the natural one, the difference is very apparent.A

When is the best time to start discussing college planning with the kids？A．When they are a

If the air stream meets with no obstruction when a sound is pronounced, it is a（n)A．voiced

（The Trouble with Television) The only thingA、mericans do when they are at leisure is to