航海英语航海气象基本知识单项选择题每日一练(2018.09.24)

单项选择题
An atoll cloud forming over an island due to heating of the land during the daytime would be which type? （）
A.Cirrus
B.Cumulus
C.Stratus
D.Nimbus
单项选择题
A boundary between two air masses is a(n)（）.
A.lapse rate
B.isobar
C.front
D.continent
单项选择题
Cumulonimbus clouds are most likely to accompany a(n)（）.
A.high pressure system
B.cold front
C.warm front
D.occluded front
单项选择题
An occluded front is caused by a(n)（）.
A.low pressure area
B.high pressure area
C.area of calm air
D.cold front overtaking a warm front
单项选择题
Cloud formations are minimal when the（）.
A.surface temperature and temperature aloft are equal
B.surface temperature and temperature aloft differ greatly
C.barometric pressure is very low
D.relative humidity is very high