写一个比-1小的有理数______．（答案不唯一）（只需写出一个即可）
根据题意，绝对值大于1的负数均可，例如-2（答案不唯一）．
Qinghai-Tibet Railway(青藏铁路) was completed last year. It is the __________ railway that connects Tibet with the other parts of China.
A．first
B．second
C．third
D．fourth
放取环时易致子宫穿孔的高危因素不正确的是：（）
A.哺乳期
B.绝经后子宫
C.瘢痕子宫
D.子宫畸形
