少尿是指24小时尿量少于()
A.800ml
B.600ml
C.400ml
D.200ml
E.100ml
参考答案:C
(6分)写出支链上共含有3个C原子,主链上含碳原子数最少的烯烃的结构简式。
Yesterday I downloaded a new program ______ the Internet. Now I can watch TV and movies ______ my computer.
A. from; on B. with; in C, in; with D. on; from