A:frightened him away
B:kept him away
C:gave him away
D:took him away
若a→,b→,c→均为平面单位向量,且a→+b→﹣c→=(332,32),则c→=____
用“乌黑”写一句话
下列关于人体血压调节的叙述中,正确的是( )