题干
—_______?
—Pretty good! How about you?
A：How do you do
B：What are you doing
C：Where are you from
D：How are you doing
答案(点此获取答案解析）
D
—_______?
—Pretty good! How about you?
A：How do you do
B：What are you doing
C：Where are you from
D：How are you doing
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）