We use ________ when proceeding in dense fog

A．auto-steering

B．gyro-pilot

C．rudder gear

D．hand-steering

[主观题]Why we use StringBuffer when concatenating strings?

[单选题]When we use VolP service，the voice packets over the Internet arrive at their destination in a（ ） stream.A．burst B.delayed C.interrupted D.continuous

[单选题]When we write, we must write as ______as we can.A.careful B.carefully C.mor

[单选题]We can use the word processor to ______ your documents.A．editB．computeC．translateD．UnloadA．B．C．D．

[单选题]When we meet a（军舰）_____, we should lower national flagA．warshipB．boatC．container shipD．bulk carrier

[单选题]When we write, we must write as______as we can.A.carefulB.carefullyC.more c

[单选题]They found the ______bridge when they went across the village.A． old stone ChineseB． Chinese old stoneC． old Chinese stoneD． Chinese stone old

[单选题]When we ______ the museum is not decided.A． visitedB． visitC． will visitD． visiting

[单选题]When should you use distress flares and rockets?（）A . Only when there is a chance of their being seen by rescue vesselsB . At half-hour intervalsC . At one-hour intervalsD . Immediately upon abandoning the vessel

[单选题]When changing lanes, a driver should use his turning signal to let other drivers know_____ .A． he is entering which laneB． which lane he is enteringC． is he entering which laneD． which lane is he entering