问题
单项选择题
If laid out in______straight line,______human digestive tract would measure approximately thirty-foot long.
A．a...the
B．/...the
C．the.../
D．the...a
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
If laid out in______straight line,______human digestive tract would measure approximately thirty-foot long.
A．a...the
B．/...the
C．the.../
D．the...a
参考答案：A