下列哪一种酶不参与血小板的花生四烯酸代谢过程?()
A.激肽释放酶
B.环氧化酶
C.血栓素合成酶
D.磷脂酶A2
E.cAMP
参考答案:A
He works in China now, But he ______in Africa for eight years .
A.worked
B.has worked
C.had worked
D.has been working
()单位帕(斯卡)是1N的力,()地作用在1m2的面积上所产生的压力。