如混浊性尿液加热后变为清亮,其混浊的原因是()。
A.脓尿
B.磷酸盐沉淀
C.尿酸盐沉淀
D.本~周蛋白尿
E.小分子蛋白尿
参考答案:A
常温常压下,下列物质是液体的是()。
A、乙烯
B、丙烯
C、丁烯
D、戊烯
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with().
A.An atomic time standard
B.Daylight Savings Time
C.Eastern Standard Time
D.Greenwich Mean Time