能防止,甚至逆转血管壁增厚和心肌肥大的抗高血压药物是
A.钙拮抗药B.α受体阻断药C.利尿降压药D.β受体阻滞剂E.血管紧张素转换酶抑制剂
参考答案:E
试述麦卡勒姆的管理经验。
70% of the earth _______ covered with water. [ ]
A. are
B. is
C. were
D. being