视网膜母细胞瘤容易发生坏死、钙化,在声像图上表现为“钙斑”,“钙斑”的超声检出率是()
A.40%
B.50%
C.60%
D.70%
E.80%
参考答案:E
找出错误并改正。
( ) 1. Would you like a tea?
A B C D
( ) 2. How many is one hot dog?
( ) 3. — May I borrow your pencil?
A B C
— Here.
D
( ) 4. — Thank you.
A B
— You welcome.
C D
( ) 5. How much bottles of water?
不等式ax2﹣bx+c>0的解集为{x|﹣1<x<2},那么不等式a(x2+1)+b(x﹣1)+c>2ax的解集为[ ]
A.{x|0<x<3}
B.{x|x<0或x>3}
C.{x|﹣1<x<2}
D.{x|x<﹣2或x>1}