为使消化腺有规律的活动，每天必须（）。
A.按时进餐
B.逐渐增加进餐次数
C.逐渐减少进餐次数
D.不定时进餐
参考答案：A
用所给词的适当形式填空
小题1:My sister ________(write) three English e-mails since last week.
小题2:We went to the bookstore ____________(buy) books yesterday.
小题3:I think it must be an ________________ (enjoy) job.
小题4:I will tell you when he _________(come) back tomorrow.
小题5:Brian walked on the street alone. Then he said to _________ (he):“I am lost”.
颈外静脉插管输液拔管时，应边抽边拔，防止残留小血块和空气进入血管造成血栓或气栓。（）
