。被称为“活犁耙”或“生物犁”的动物是____。
词语运用
①The old man is d____.He can't hear anything.
②My dog is m____.Can you help me find it?
③All of them are ____(注视) at the computer screen.
④We don't know whether he's ____(活着)or dead.
⑤The road was so narrow(狭窄)that cars were unable to ____(通过).
到南极考察的工作者，为了保护环境，除了必须把塑料和金属类废物带离南极外，还必须把人的尿液，粪便带离南极，这是因为南极（ ）
施行。这表明全国人大常委会①行使立法权②坚持民主集中制③严格依法行政④领导全国武装力量
