长期高血压易导致哪些脏器出现并发症
A.心、肺、脑B.心、肝、肾C.心、脑、肾D.肝、肾、脑E.肝、肾、肺
参考答案:C
在Rt△ABC中,∠C=90°,cosA=______.(三边分别对应a,b,c)
I believe there will be ______ pollution in 20 years. [ ]
A. fewer
B. fewest
C. less
D. least