Social change is easier if it takes place ______.
A. step by step
B. among Black Americans
C. between Black Americans and their white counterparts
D. between Black Americans and other American minorities
查看答案
Which of the following statements is supported by the passage？
A scientist's most difficult task is testing hypotheses.
B. It is better to revise a hypothesis than to reject it.
C. Theories are simply imaginary models of past events.
D. A good scientist needs to be creative.
The passage mainly discuss ______.
A. the decline of the Japanese economy
B. the great change of the ethnical and value concept of youth in Japan
C. the existence of generation gap between youth and their parents
D. the increase of birth rate
The word "it" (Line 2, Para. 2) most probably refers to ______.
A. economic depression
B. job insecurity
C. birth rate
D. financial unsafety
In the third paragraph, bricks are mentioned to indicate how ______.
A. science is more than a collection of facts
B. scientific experiments have led to improved technology
C. building a house is like performing experiments
D. mathematicians approach science
微信支付 
支付宝支付