单项选择题
A.east B.west C.east in west longitude and west in east longitude D.west in west longitude and east in east longitude
During a period of “whiteout”，you should expect which o...
单项选择题During a period of “whiteout”，you should expect which of the following?（）
A.Snowfall or blowing snow B.Lack of ability to estimate distance C.Harsh contrast between sun-illuminated snow cover and the background D.Hazy horizons with extensive mirage effects
Don’t（） this news to the public until we give you the g...
单项选择题Don’t（） this news to the public until we give you the go-ahead.
A.release B.relate C.relieve D.retain
Don’t（）things too seriously.A.takeB.thinkC.believeD.con...
单项选择题Don’t（）things too seriously.
A.take B.think C.believe D.consider
