下图为人均交通能源消耗量与人口密度的关系示意图,据图分析,下列说法最可信的是( )
A:人均交通能源消耗量越低的地区,私家车的拥有量越低
B:费城的交通能源消耗量高于东京
C:人口密度大的城市居民的出行方式公共交通占比高
D:人口密度小的城市经济水平高,人均变通能源消耗量低
关于电流和电路,下列说法中正确的是( )
____和____都是细胞中的能量转换器.
A dog has a piece(片) of meat in his mouth. He sees himself(他自己) in the water. He thinks it is another dog. That dog has a piece of meat in his mouth,too. He wants to get(得到) his meat. Then he can have two pieces. He opens his mouth to bark(吠叫) and his meat goes down into(在……里面) the water.
用下面的词语写一句话。
发现:____