3.肉眼血尿每升尿内含血至少为 ( )
A. 1ml
B. 2ml
C. 3ml
D. 4ml
E. 5ml
6.少尿是指每小时尿量少于( )
A. 22ml
B. 18ml
C. 20ml
D. 17ml
E. 30ml
I find it difficult to stop _______ my car.
A. to used
B. using
C. used
D. to using
environment的形容词是______.
A. environmental
B. encourage
C. endanger
D. enrich