哺乳动物的皮肤在整个生命过程中是不断更新的。（）
参考答案：对
The driver was at______loss when________word came that he was forbidden to drive for speeding. [ ]
A. a; the
B. /; /
C. the; the
D. a; /
浙江大学2010年到2013的学位论文数量（）
A.17865篇
B.20000篇
C.19176篇
D.15654篇
