短文填空。根据短文内容和首字母提示，把所缺单词填写在短文中相应的横线上，使句意完整。

     One day two young men went to the forest. On the way, one said (1)t_____ the other, "We're (2)g_____

friends. We must help each (3)o_____." "All right!" the other one answered. After a short (4)t_____, there

was a great noise. It was a big bear. The two men ran (5)a_____ quickly. One of them got up into a tree.

The other was fat and couldn't (6)c_____ up. He threw himself at the foot of the tree. The bear came near.

It looked at the fat man, put (7)i_____ nose down and smelt him. It thought the young man was dead, so it

walked away. The man in the tree came down. He asked his friend, "The bear put its mouth so near to your

ear. (8)W_____ did it say to you?" The fat young man answered, "the bear said, 'A friend in need is a friend

indeed.'"

根据GB7588-2003相关规定，电梯额定速度为0.63m/s，选用不可脱落滚柱式瞬时安全钳，限速器的动作速度最小为（）；最大为（）。

A、0.72m/s

B、0.8m/s

C、1.0m/s

D、1.5m/s