用于连接大横杆的对接扣件开口应朝向脚手架的：（）
A、外侧
B、上侧
C、里侧
参考答案：C
You can’t imagine what great difficulty I had _______ a ticket for Jay Chou’s concert in Zhengzhou.
A．to get
B．getting
C．got
D．get
早期肝癌常需与________、____________、___________、_________、_______等鉴别。
