Come and see the India elephants and the new tigers from America. The bears are waiting to meet you, and the monkeys from China are waiting to throw（扔） things to you. The lovely dogs from Australia are waiting to laugh at you. The giraffes from Brazil are waiting to look down on you.
Tickets                             Open time
Grown-up:（成人）$2.00             9:00a.m—4:00p.m
Children :over 12 $1.00               Except（除）Friday
Under12 Free(免票)                  10:00a.m—3:00p.m
Keep the zoo clean!
Don't touch(触摸) , give good food or go near the animals!

写作。　
        兴趣是良师益友。她牵引着你走进趣味盎然的生活，她指引着你一步步去探索神奇美妙的世界，她引领着你去采摘甜蜜的成功果实。有了兴趣的牵引，生活就会更加愉悦、幸福。
        请以“兴趣，是一种甜蜜的牵引”为题，写一篇不少于600字文章。

如图所示，两块相同的木块被竖直的木板夹住保持静止状态，设每一木块的质量为m，则两木块间的摩擦力大小为（   ）

下列各句中没有语病的一句是（   ）