_will it strike？ In twenty minutes’ time（）
A. When
B. How long
C. How long ago
D. How much
查看答案
____ does he calls？ Once a month（）
A. How seldom
B. How long
C. How soon
D. How often
The total human environmental impact is related to（）
A. Industrial distribution
B. Population size
C. Social relations
D. Resource reserves
Which item is suit to describe the relationship between industry and improving of environmental quality（）
A. The operation of industrial system has nothing to do with environmental quality
B. The operation of industrial system is independent of the state of resources
C. Optimizing Industrial system can improve the relationship between Human and Environment
D. The operation of industrial system has nothing to do with human consumption pattern
Which item is usually unrelated to the excess of heavy metal pollutants in an area（）
A. Metal smelting and regeneration
B. Metal processing and manufacture
C. Use of metal products
D. Natural migration of metal substance on the earth surface
微信支付 
支付宝支付