小题1:The ___________(树叶) turn yellow and fall in autumn.

小题2:Ronald Reagan was the____________ (四十)President(总统) of the U.S.A.

小题3:Mr. Hunt didn’t come to the party because he wasn’t ___________(邀请).

小题4:Tom is ____________(瘦) than any other boy in his class.

小题5:We should speak ____________ (礼貌地) to the old people.

小题6:He is now used to ____________(跑步) on the playground in the morning.

伤寒第3～4周时阳性率最高的是：（）

A.骨髓培养

B.血培养

C.尿培养

D.大便培养

E.肥达反应