作文是一封邮件说某airline lost profits last year, 上一年oil prices increase, at the same time, the airline increase operations, added more flights to five cities. As all airlines faced with oil prices increase, some airlines still make more profits, so the oil prices alone not the reson for the loss in profits, the added flights should be responsible.
Q491.x.y both are integers, x^y is odd?
I.x is odd
II.y is odd
(我选了only I is sufficent)
3.一共有160bikes放在两层的停车场里,15%yellow bikes,请问放在第一层的not yellow bikes有多少
I.40 not yellow bikes in second floor
II.20 yellow bikes in first floor
(我选了only I is sufficent)