单项选择题
Early indications of the approach of a hurricane may be all of the following EXCEPT（）.
A.short confused swells B.gradually increasing white clouds (mare's tails) C.pumping barometer D.continuous fine mist-like rain
单项选择题 Cirrus clouds are composed primarily of（）.
单项选择题 An aneroid barometer reading should be corrected for differences in（）.
单项选择题 An anemometer on a moving vessel measures（）.
