Which of the following is TRUE？
A. The various petroleum products are produced by filtration.
B. Heating and condensation produce the various products.
Chemical separation is used to produce the various products.
D. Mechanical means such as the centrifuge (离心机) are used to product the various products.
查看答案
Panmixia is said to_____.
A. aid the selection process
B. complement individualization
C. inspire positive results
D. set up biological decline
Which of the following best describes the spring climate of the area of the country the author is describing？
A. Cold and dry
B. Warm and humid
Cool and wet
Dry and warm
What does this passage mainly discuss？
A. Children will become more and more mature when growing up.
B. Parents have to change their ways in educating their children.
C. The conflicts between parents and their children are inevitable.
D. Parents have made mistakes in communication with children.
How to raise diversity awareness according to the author？
A. By living in an unfamiliar environment.
By having politically correct attitudes.
C. By being sensitive to everything one experiences.
D. By understanding people's differences.
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