-5’标记DNA片段按Maxam和Gilbert方法测定序列得图谱如下,因此该DNA的序列应该是()。
A、①
B、②
C、③
D、④
参考答案:C
--- What's one fourth and a half, do you know?
--- Yes, it's _________.
A.two sixths
B.three fourths
C.one three
D.three sixth
甘温除热的代表方剂是
A.小建中汤B.补中益气汤C.四君子汤D.黄芪桂枝五物汤E.升阳益胃汤