If people are exposed to Internet violence too often, ______.
A.they will be bored and then get rid of the habit
B.they may put into practice what they've learn from violence
C.they will begin to doubt the existence of the violence
D.they will learn from others' misfortunes
第3题
由心房收缩挤入心室的血液量占心室总充盈量的()。
A.55%
B.50%
C.45%
D.40%
E.25%
第4题
心房收缩挤入心室的血液量占心室总充盈量的
A.0.05
B.5%~10%
C.10%~30%
D.0.5
E.0.8
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