为了尽快得到某种植物的幼苗，在选种时最好选用[ ]
A．刚采下的幼嫩种子
B．已度过休眠期的种子
C．刚采下的快要成熟的种子
D．正在进行休眠的种子
答案：B
短文改错（包括与图中不符的错误和语法错误），并在下面横线上改正。
Man: Now, Sheila, tell me what you can see in the picture.
Sheila: Well I can see a park. There has four child on the grass. One of they is watching a book, while
the other are playing the football. There is a white dog under the tree, and a parrot on the tree. The parrot
can speak English, Listen, it is saying "Good morning!"
Man: Thank you, Sheila. Um, do you wear glasses?
1._______2._______3._______4._______
5._______6._______7._______8._______
某食品科调查克山病区6份主食大米中硒含量与该地居民血硒含量，计算得r=0．808，0．10>P>0．05。下结论时应慎重。这是因为（）
A.若将双侧变为单侧结论相反
B.若适当增加样本含量可能拒绝
C.若进行数据变换，可能得到不同的结论
D.若将α水准由0.05改为0.10，则拒绝零假设
E.以上都不是
