一只鸵鸟的体重达81千克，一只鸡的体重是4.5千克．这只鸵鸟的体重是这只鸡的____倍？

下列动物是澳大利亚国徽上的一组是：    (     )

A: Mum, I have finished my homework .____ .
B: Of course .Which is your favorite TV program ?
A: Sports .It is said there will be a wonderful football match on TV tonight .
B: ____ 
A: A Chinese team will play against a Japanese team .
B: ____ 
A: I'm not sure . Ball games are usually shown on Channel 8.
B: ____ 
A:Well , it must be on Channel 6 then . Try that .
B: Here it is .____  Let's watch it together .
A: That's all right.

    贾岛初赴举，在京师。一日于驴上得句云：“鸟宿池边树，僧敲月下门。”又欲“推”字，炼之未定，于驴上吟哦，引手作推敲之势，观者讶之。时韩退之权京兆尹，车骑方出，岛不觉行止第三节，尚为手势未已。俄为左右拥止尹前，岛具对所得诗句，“推”字与“敲”字未定，神游象外，不知回避。退之立马久，谓岛曰：“‘敲’字佳。”遂并辔而归，共论诗道，留连累日，因与岛为布衣之交。