单项选择题

Paragraph 1 （）

A. How is cancer treated
B. Does cancer always cause pain
C. Can cancer be prevented
D. What is cancer
E. How common is cancer
F. What causes cancer

<上一题 目录 下一题>
热门 试题

单项选择题
The 25 trials involved roughly the same number of participants.（）

A． Right
B． Wrong
C． Not mentioned
单项选择题
The trials were stopped early because the treatments proved to be of no value.（）

A． Right
B． Wrong
C． Not mentioned
相关试题