题干
—Excuse me．Is this parking lot open for public use？—No．But that across from the road is open for anyone．
A：it
B：it's
C：one
D：its
答案(点此获取答案解析）
C
—Excuse me．Is this parking lot open for public use？—No．But that across from the road is open for anyone．
A：it
B：it's
C：one
D：its
中，底面
为边长等于2的等边三角形，
垂直于底面
与平面
所成角的正弦值为
