x是整数，2x +1是[ ]
A.奇数
B.质数
C.偶数
答案：A
①彼得一世改革 ②穆罕默德·阿里改革 ③亚历山大二世改革 ④戊戌变法
— Everything is ______ at night markets.
— Really? That's to say I don't need a lot of money to have a good time. [ ]
A. cheap
B. bad
C. tired
D. dear
