especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed and shipped,

　　__26__

　　takes fuel. Most of the cow won’t even be used for meat people eat. By the time a hamburger finally lands to a dinner plate,

　　__27__

　　has made bad effect on the environment.

　　We can reduce the production of global warming gases by eating less beef. Other kinds of meat like pork and chicken do

　　__28__

　　harm to the environment—at least in terms of the amount of greenhouse gases released.

　　__29__ , all kinds of meat are harder

　　__30__

　　the planet than vegetables.

　　__31__

　　changing our diet to less meat and more vegetables, as it turns

　　__32__， may do the world some good.

　　25．________　26.________　27.________　28.________

　　29．________　30.________　31.________　32.________

　　(五)

　　A walking robot maid which can clean a home, dump clothes in a washing machine and even heat food in a microwave has been developed by South Korean scientists.

　　Mahru­Z has a human­like

　　__33__

　　including a rotating head, arms, legs and six fingers plus three­dimensional vision to recognize chores(家庭杂事)that need to be

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