单选题

DAILY TRAIN SCHEDULE

Train	Scheduled Departure Station S	Scheduled Arrival Station T
X	7:08(EST)*	8:10(EST)

* Eastern Standard Time
The table above shows the morning schedule for train X. If Juan took train X on Monday morning, did he arrive at station T on schedule?
(1)Juan arrived at station T on Monday morning 1 hour and 2 minutes after he left station S.
(2)Juan arrived at his office at 8:30 (EST) on Monday morning, which was 20 minutes after he arrived at station T.

A、条件(1)充分，但条件(2)不充分．
B、条件(2)充分，但条件(1)不充分．
C、条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
D、条件(1)充分，条件(2)也充分．
E、 (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

【正确答案】 B

【答案解析】[解析] (1)不充分，因为从(1)中我们只能得知，火车运行的时间与时刻表中的相一致，但却无从得知火车是否准时从S站出发，因此也无法推知Juan是否准时到达车站T；(2)充分，因为(2)中指出Juan在8:30到达办公室，是其到达车站T后的20分钟，由此可推知Juan到达T的时间为8:10，所以Juan准时到达了车站T。