（）适应地基变形能力强。
A．重力坝
B．土石坝
C．面板堆石坝
D．拱坝
参考答案：B
It is a strange phenomenon that some young people today think it is their parents’responsibility to earn money and_______ to spend it.
A．them
B．they
C．their
D．theirs
请简述WLAN室外独立放装的建设方式。
