_____ his shoes under the bed on the floor?[ ]
A. Are
B. Is
C. Has
D. She's
答案:A
A.I有=3/2A,Im=3A
B.I有=3A,I有=3A
C.I有= A,I有 A
D.I有3A,Im=6A
CSF中葡萄糖含量( )
A.与血糖含量相同B.比血糖含量高1/3C.比血糖含量高1/2D.相当于血糖含量的20%~40%E.相当于血糖含量的50%~80%