张丹得了急性阑尾炎，验血时发现血液中增多的是[ ]
A．白细胞
B．红细胞
C．血红蛋白
D．血小板
答案：A
– Mum, do you know if Dad _____ a model plane for me?
- I think he will do if he _____ free.
A．will make; will be
B．makes; is
C．makes; will be
D．will make; is
X线片上拔牙窝的影像完全消失至出现正常骨结构的时间是在牙拔除后约（）
A.6~8周
B.3~6个月
C.7~10个月
D.11~12个月
E.1年以上
