如果患者咀嚼时，下颌长期处于侧方运动幅度较大时，则患者牙列的磨耗状态是（）。  A.

Train No.	From	To	Departure  Time	Arrival  Time
11	Beijing	Shenyang	6:35	17:50
186	Chengdu	Taiyuan	22:50	5:05
185	Taiyuan	Chengdu	13:09	19：30
271	Tianjin	Beijing	8:35	10:21

小题1:The train from Beijing to Shenyang leaves at  _____.
A．5：05   　B．6：35      C．8：35   
小题2:It takes ________ to get from Beijing to Shenyang .
A．17 hours and 50 minutes  
B．11 hours and 15 minutes 
C．6 hours and 35 minutes
小题3:If you want to go to Chengdu from Taiyuan,  you can take the ________ train.        
A．No.11   B．No.185   C．No.186
小题4:The No.186 train arrives in Taiyuan at________.
A．5：05 p．m.    B．10：50 p．m.   C．5：05 a．m.    
小题5:It takes _______from Tianjin to Beijing by train.
A.about 2 hours  B．half an hour  C．about an hour