题目内容
（请给出正确答案）
[主观题]
If visitors from other planets have actually landed on the earth, one can assume that they
came to ______.
A．make war
B．communicate
C．settle clown
D．explore
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A．阿司匹林
B．阿司匹林+氯吡格雷
C．阿司匹林+华法林
D．阿司匹林+氯吡格雷+华法林
E．氯吡格雷+华法林
