我国水资源空间分布特点是[ ]
A、多年平均径流总量居世界第六位
B、夏秋两季多，冬春两季少
C、南多北少，东多西少
D、各年之间的变率大
答案：C
设已知p：（4x-3）2≤1；q：（x-a）（x-a-1）≤0；若￢p是￢q的必要不充分条件求实数a的取值范围．
There is only one who is capable of setting limits to your growth, and it _____ well be you.
A．may
B．should
C．will
D．must
