The diagram below shows the weather system of a certain day in China.

1。 The air pressure in A is higher than that in B, which means that the air pressure in the middle is low, and China is easily affected by tropical air < P > cyclone (tropical depression) in summer, and there is a cold front in the picture, which will not < P > occur next to high air pressure, so the answer is a

2. The wind direction of C is from high pressure to low pressure, so it can be concluded that the wind direction is from A to B (westerly wind) < P >, and it will be shifted to the south under the influence of the earth's rotation bias, and the final result is (northwest wind).