下列哪些基因属于HIV的调节基因()
A．vif
B．rev
C．tat
D．nef
E．vpr
参考答案：B, C, D
Tiny Tim, a character in A Christmas Carol, was a happy little boy in spite of the disability that caused him a weakness in one leg .
A．to limp
B．to fall
C．rest
D．suffer
正宗川菜是以（）两地的菜肴为代表。
A、四川泸州、绵阳
B、四川成都、重庆
C、江苏南京，苏州
D、浙江绍兴、杭州
