It can be learned from the first paragraph that______.
A．ART is double-effected
B．HIV science is challenged
C．AIDS research is dishonest
D．AIDS denialism is prevalent

未分类题Which of the following would be the best title for the text?A．Double-sidedness of ART.B．HIV Science in Action.C．The Monster of AIDS Denialism.D．The Fight against AIDS Conspiracy.

单项选择题新民主主义社会时期，属于社会主义性质的经济成分是()

未分类题It is suggested real-time bid ads help advertisers to______.A．ease competition among themselvesB．lower their operational costsC．hold a stable customer baseD．provide better online services

单项选择题一种社会制度是否先进和具有优越性，从根本上说是看其能否()。

未分类题'The critics'(Line 5, Para. 5)most probably refers to those on the side of______.A．President ObamaB．Supreme CourtC．Arizona state governmentD．Scholars in the research