不等式2x－1<3的非负整数解是 。
0，1
2x-1＜3，2x＜3+1，2x＜4，x＜2，∴不等式2x-1＜3的非负整数解是0，1
— If he _____, he _____ that poisonous food.
— Luckily he came back to life immediately. [ ]
A. was warned; would not take
B. had been warned; would not have taken
C. would be warned; had not taken
D. would have been warned; had not taken
元代形成的民族是：（）
A、女真
B、回族
C、汉族
D、藏族
