题干
--- How long may I your bike?
--- For a week. But you mustn't it to others.
A：borrow; lend
B：keep; lend
C：lend; borrow
D：keep; borrow
答案(点此获取答案解析）
B
--- How long may I your bike?
--- For a week. But you mustn't it to others.
A：borrow; lend
B：keep; lend
C：lend; borrow
D：keep; borrow
，
，则集合
=（ ）
的值（ ）.（结果精确到0.1）
