单项选择题
A.difference between the reading of the two pointers，which shows wind direction
B.last two figures of the reading of the pointer，such as 87，76，or 92
C.present reading of the pressure，combined with the changes in pressure observed in the recent past
D.weather indications printed on the dial (such as cold，wet，etc.) under the pointer
单项选择题 The legend/symbol which designates an occluded front is represented by a（）.
单项选择题 The inner cloud bands of a hurricane，when viewed from a distance，form a mass of dense，black cumulonimbus clouds called the（）.
单项选择题 The greater the pressure difference between a high and a low pressure center，the（）.