题干
He moved to a foreign country, where he was obliged to ________ himself to the new habits and customs.
A：adapt
B：adopt
C：fit
D：suit
答案(点此获取答案解析）
A
A：adapt
B：adopt
C：fit
D：suit
的底面边长为
，侧棱长为
，那么经过底边
的中点且平行于侧棱
的截面面积为（ ）