配平下列化学方程式

（1）　____ Al+____ 　O₂____ 　Al₂O₃

（2）　____ 　Zn+____ 　HCl═____ 　ZnCl₂+____ H₂↑

（3）　____ CH₄+____ O₂____ CO₂+____ H₂O

（4）____ 　KClO₃____ 　KCl+____ 　O₂↑．

你能用一副三角板量出下面所有的角吗？

小胖在单杠上翻转出各种角度

    A boy was walking in the street 1 a man came over 2 him and 3 him the way4 the station.

    The boy was very naughty（顽皮的）. He wanted 5 play a joke on the man. He pointed to6side of the road and said, “Go down the street until you reach a shop. You can find it on your left.” The man thanked him and went away.

    A few minutes 7, the man came back. He said to boy that there was only a bookshop there and he 8 find the station.

    The boy 9 and said, “10a map in the bookshop, and you'll find the way!”