捕杀森林中的全部肉食性动物后，鹿、兔等植食性动物的奔跑速度将会 [ ]
A．变快
B．变慢
C．不变
D．先快后慢
答案：B
Tom often ______ TV in the evening. He’s _____ TV now.
A．watches; watching
B．watching; watches
C．watch; watching
D．watches; watches
质量控制的手段是什么？
