搜题请搜索小程序“爱下问搜题”
问题 单项选择题

胎儿脊柱的正常声像图表现为：a．纵切面呈一条排列整齐的强回声带；b·纵切面呈串珠状的小强回声团块排列成两条弓状平行强回声带；c．纵切面呈一连串念珠状的小强回声团块；d·横切面可见3个强回声团块，呈“品”字形

A．abc

B．ac

C．bd

D．d

E．abcd

答案

参考答案：C

选择题

17. Our attention was drawn to the eight-year-old girl who was _______ perfectly at the piano.

A．acting

B．behaving

C．performing

D．doing
查看答案
选择题

He stared at the empty bottle for a while, feeling happy that he had sent the butterfly back ________ it belonged-nature. [ ]

A. to which  

B. that

C. which  

D. to where
查看答案