去甲肾上腺素释放至突触间隙,其作用消失主要原因是()
A.被单胺氧化酶代谢
B.肾排出
C.神经末梢再摄取
D.被乙酰胆碱酯酶代谢
E.被儿茶酚氧位甲基转移酶代谢
参考答案:C
下列变化属于物理变化的是
A.纸张燃烧
B.铜表面生成铜绿
C.活性炭吸附有色气体
D.含氢氧化铝的药物治疗胃酸过多症
If you want to________in the world, you must learn to work hard while you are still young. [ ]
A. make much of yourself
B. make the way out
C. make you out
D. make your way