题目

-I think winter is a beautiful season,_______ when it snows.  -Me, too.  A. specially  B. especially  C. proba bly  D. properly  答案:B 已知平面向量a=(3,1),b=(x,-3),且a·b=0,则2a-3b= [  ] A.(2,4) B.(5,5) C.(9,11) D.(3,11)
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