少年期的性生理知识教育着重于( )方面的教育。
A．性功能B．性生活C．性行为D．性器官的解剖生理和卫生
参考答案：D
层门地坎应高出装修地面（）mm。
A、1~2
B、2~5
C、5~8
D、8~10
_____ prevent her from going to the party, he pretended to be ill ______.
A．So as to, by design
B．In order to, on purpose
C．So as to, by accident
D．In order to, with purpose
