抑制黄嘌呤氧化酶的是
A．甲氨蝶呤 B．阿糖胞苷 C．别嘌呤醇 D．6巯基嘌呤 E．8氮杂鸟嘌呤
参考答案：C
There______ great changes in our country since 1979. [ ]
A. have been
B. were
C. has been
D. are
漫画《逢听必涨》旨在说明[ ]
①民意是政府科学决策的根本保证
②要严格规范听证程序，确保决策科学
③要加强遴选，使听证代表客观反映民意
④涉及公众利益的重大事项必须交予群众民主决策
A、①②
B、②③
C、①③
D、③④
