A. Keeping Good Relations with Local Businessmen
B. Service Provided by Local Newspapers
C. Large Circulation of the National Newspapers
D. Special Features of Local Newspapers
E. Power of Local Newspapers
F. Popularity of Local Newspapers
Paragraph 4 ______.

单项选择题The word bump in Paragraph 3 may mean ().

A. to make something run fast
B. to cause to revolve
C. to move smoothly
D. to collide

单项选择题52（）

A. rupture
B. corruption
C. eruption
D. disruption

单项选择题What did Jules Hirsch do in his study

填空题D

填空题We can measure the effects of the interaction of whatever is inherited with ______.