单选题Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours.You should（）.AExpect to see cirrus clouds followed by altostratus and nimbostratus cloudsBAlter course to remain in the navigable semicircleCPrepare for gusty winds，thunderstorms，and a sudden wind shiftDExpect clear weather，with steady winds and pressure，until the front passes
单选题
Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours.You should（）.
A
Expect to see cirrus clouds followed by altostratus and nimbostratus clouds
B
Alter course to remain in the navigable semicircle
C
Prepare for gusty winds，thunderstorms，and a sudden wind shift
D
Expect clear weather，with steady winds and pressure，until the front passes
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