题目内容：

    ''They're made out of meat. ''

''Meat? ''

''There's no doubt about it. We picked up several from different parts of the planet, took them aboard our craft, and probed them all the way through. They're completely meat.''

''That's impossible. What about the radio signals? The message to the stars? ''

''They used the radio waves to talk, but the signals don't come from them. The signals come from machines. ''

''So who made the machines? That's who we want to contact. ''

''They made the machines. That's what I'm trying to tell you. Meat made the machines. ''

''That's ridiculous. How can meat make a machine? Maybe they're like the Orfolei. You know, a carbon - based intelligence that goes through a meat stage. ''

''No. They're born meat and they die meat. We studied them for several of their life spans, which didn't take long. Do you have any idea what's the life span of meat? ''

''Spare me. Okay, maybe they're only part meat. You know, like the Weddilei. A meat head with an electron plasma(电浆) brain inside. ''

''No. We thought of that, since they do have meat heads, like the Weddilei. But I told you, we probed them. They're meat all the way through. ''

''No brain? So. . . what does the thinking? ''

''You're not understanding, are you? You're refusing to deal with what I'm telling you. The brain does the thinking. The meat. ''

''Oh, my! So what does this meat have in mind? ''

''First it wants to talk to us. Then I imagine it wants to explore the Universe, contact other creatures, exchange ideas and information. The usual. ''

''We're supposed to talk to meat! ? ''

''That's the idea. That's the message they're sending out by radio. 'Hello. Anyone out there? Anybody home? ' That sort of thing. ''

''They actually do talk, then. They use words, ideas, concepts? ''

''They do, but what do you think is on the radio? Meat sounds. They can even sing by forcing out air through their meat. ''

1.The ''meat'' probably refers to _________.

A.human beings on Earth

B.creatures on Earth

C.the Orfolei

D.the Weddilei

2.The two beings talking in the story seem to _________.

A.know the species of human beings a long time ago

B.be quite different from human beings in species

C.be made put of electrons

D.be made out of metals

3.The tone of the story is _________.

A.humorous B.serious

C.objective D.surprising

4.It can be inferred from the passage that human beings _________.

A.are the pioneer to adventure in the universe

B.as a species are the same as other creatures

C.as a species are inferior to the two beings who are talking

D.are looked at from a new point of view