填空题

The AIDS virus is very delicate and can be killed by being ex posed to air or stomach acid.

【参考答案】

Y

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填空题

The writer of the article feels that the theories of an AIDS transfer from monkey to man are just as crazy as many other theories.

填空题

The U.S. Food and Drug Administration has acted against similar contamination incidents like that involving SV40 out of fear of a wider spread of AIDS.