可显示尿液有形成分中盐类结晶的精细结构,常用的检查方法为()。
A.光学显微镜法
B.相差显微镜法
C.偏振光显微镜法
D.透射电镜法
E.尿沉渣分析仪
参考答案:C
It was because I was caught in the traffic jam ________ I came to school late this morning.
A.which
B.when
C.what
D.that
成分输血的优点()
A.疗效好
B.副作用小
C.节约血液资源
D.便于保存和运输
E.降低输血传染病的发生