古代字画能长期保存，是由于单质碳在常温下具有（ ）
下列岩石中，属于变质岩的是（ ）
2013年7、8月份,全国降水总体北多南少,长江中下游地区降水量较常年同期偏少50%,为1951年以来最少;然而,“南旱”的同时,北方地区却迎来了丰沛的降水。东北降水量较常年同期偏多36%,华北、西北也分别偏多35%和36%。嫩江、松花江发生了1998年以来最大洪水. 我国南方地区为粮食的生产作出了巨大贡献,以下别称不位于南方地区的是( )
as far as I know, tourist，huge，dangerous，meter, weigh，protect，ocean
I'm Amy Black．I have never seen sharks in the____．But as a(n)____，I have seen sharks in an aquarium(水族馆)．
____，there are between 200and 250 kinds of sharks of different sizes．Sharks are much____than other fishes．The largest carl be as long as 15____ largest shark____about 3，200 kilos．Usually sharks don't attack(攻击)people．Sometimes they attack people____themselves．One of____sharks is the Great White Shark．They attacked a lot of people on the beaches of America．
