引起核黄疸的血清胆红素浓度一般超过()。
A.10mg/dl
B.12mg/dl
C.15mg/dl
D.20mg/dl
E.25mg/dl
参考答案:D
已知线段MN=8cm,又点P是线段MN的一个黄金分割点,那么其中较长线段MP的长是______cm.
—Are you free this evening?
—No. I have _______ work to do this evening. [ ]
A. much too
B. too much
C. too many
D. many too