-How long may I _____ the book?
-Two weeks.[ ]
A. borrow
B. lend
C. buy
D. keep
答案:D
_______ do you exercise in a week?[ ]
A. How long
B. How far
C. How to
D. How often
下列哪些是心肌梗死病灶的CT增强扫描表现()
A.早期增强扫描呈高密度影
B.早期增强扫描呈局限性低密度影
C.延迟扫描原低密度影范围缩小
D.延迟扫描呈低密度影
E.延迟扫描呈片状高密度影