最早提出基因一词的人是()
A.威廉.路德维希.约翰逊
B.孟德尔
C.克里克
D.沃森
参考答案:A
Last week only two men came to look at the house, ________ wanted to buy it.
A.neither of whom
B.neither of them
C.both of them
D.both of who
常规青贮原料的适宜含水量为()。
A、75%-85%
B、65%-75%
C、55%-65%
D、45%-55%