有防水层的地面与墙面交接处的找平层阴角应抹成（）形，弧度应满足贴砖要求.
A.直角
B.三角
C.锐角
D.圆弧
参考答案：D
Lin's parents are disabled. He________help them with the housework after school every day. [ ]
A. need to
B. need
C. needs to
D. needs
