需要干扰血清总蛋白的双缩脲法测定的是（）
A.血清呈乳糜状
B.高血糖
C.高血钾
D.高血钠
E.高血钙
参考答案：A
I've become good friends with several of the students in my school ________ I met in the English
speech contest last year.[ ]
A. who
B. where
C. when
D. which
剃刀在修磨时，应注意多磨阳口，少磨阴口，其比例为（）。
A.8∶5
B.6∶1
C.7∶3
D.7∶1
