题目内容

An optimist does not necessarily try ___________

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The patient's life was expected to last several years longer by implanting the artificial

A. Right
B. Wrong
C. Not mentioned

According to the passage, social distance refers to___________

A. physical distance
B. psychological distance
C. physiological distance
D. philosophical distance

According to the last paragraph, bumping with a motor vehicle took up___________deaths re-ported since 1992.

A. over 80%
B. below 80%
C. about 31%
D. about 36%

If an animal's critical distance is penetrated, it will___________

A. begin to attack
B. try to hide
C. begin to jump
D. run away