Read the map of isobar below (the solid line is isobar) and answer the questions. Question 1: If the dotted line is the trough line of low pressure in the mid-latitude area of the northern hemisphere,

Read the map of isobar below (the solid line is isobar) and answer the questions. Question 1: If the dotted line is the trough line of low pressure in the mid-latitude area of the northern hemisphere, then the wind direction at point Q is

Question 1:D

Question 2: D.

Question 3:C

Test analysis:

Question 1: According to the dotted line as the trough line of low pressure in the mid-latitude area of the northern hemisphere, it is judged that the isobar in the diagram should conform to the "convex height". Then, by using the distribution of the isobar in the diagram, the wind direction intersects the isobar obliquely, and the geostrophic force in the northern hemisphere shifts to the right from high pressure to low pressure, so that the wind direction can be drawn as southwest wind.

Question 2: If the dotted line is the trough line of low pressure in the mid-latitude area of the northern hemisphere, and the frontal cyclone map of the northern hemisphere can be drawn by combining with the isobar, then a cold front should be formed at the trough of low pressure, and the front should move to the southeast. A is located on the side of the cold air mass, which is a rainy area with small daily temperature difference; B is located on the side of the heating mass, with clear weather and large daily temperature difference.

Question 3: In July and August, the Jianghuai area in China was controlled by the subtropical ridge, and there was summer drought. High pressure control, prevailing downward flow, sunny weather, so a and d are wrong; Sand blowing and sandstorm are weather systems affected by cold front.

Comments: This question is generally difficult. Students can only draw the wind direction according to the principle of isoline "convex height, convex low height", and then draw the frontal cyclone map in the northern hemisphere combined with the typical weather judgment that affects the formation of common weather systems in China. Drawing pictures is the key to solving problems.