There is no difference in structure between the self-contained heart and the mechanical heart.
A. Right
B. Wrong
C. Not mentioned
查看答案
An optimist does not necessarily try ___________
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%