题干
Jone’s father was among the first to make his fortune in___________is now known as the most fantastic tourist attraction—Hawaii.
A：where
B：what
C：which
D：that
答案(点此获取答案解析）
B
时，可以确保山体不滑坡．某小学紧挨一座山坡，如图所示，已知
，斜坡
长30米，坡角
．改造后斜坡
与地面成
至少是多少米？（精确到0.1米）