持用()的旅客应当核对相应的证件。
A.儿童票
B.学生票
C.硬卧票
D.残疾军人票
参考答案:B, D
What ___ he ___ at nine last Sunday morning? [ ]
A. does, do
B. did, do
C. was, doing
合成磷脂时,除消耗ATP外,还消耗
A.ATPB.CTPC.GTPD.UTPE.TIP