The pE value of natural water with the decrease of pH（）
A. Decrease
B. Increase
C. Decrease first and then increase
D. Keep stable
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What characteristics of soil lead to the non-linearity of pollution process and the decrease ofbioavailability of pollutants（）
A. Severe human disturbance
B. Affected by atmosphere and hydrosphere
C. Highly heterogeneous medium
D. No significant change with time
Pentachlorophenol is an efficient and cheap broad-spectrum insecticide, preservative and herbicide, which has been widely used in schistosomiasis endemic areas to kill（）
A. Larva of Schistosoma japonicum
B. Intermediate host snail of Schistosoma japonicum
C. Adult Schistosoma japonicum
D. Male Schistosoma japonicum
What is not the reason that Haier is important（）
A. It is outstanding and successful
B. It offers an insight into the changes washing across the Chinese economy
C. It has a large number of employees
D. A and B
Haier is using the following effective ways to be strong and competitive（）
A. distribution
B. outsourcing
C. new technology
D. all of the above
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