单选题
What do Doctor Marcia Angell and other people fear?
A、
To prevent the spread of HIV has a long way to go.
B、
The HIV-infected people in the study are not treated equally as those in industrial countries.
C、
The result of the study may not be effective in industrial countries.
D、
AIDS research is not carried out correctly in poor countries.
【正确答案】
B
【答案解析】
提交答案
关闭