题干
—Simon , what do I need to take for the hiking ?
—You'd better _____ more water than usual . It's hot today
A：to take
B：take
C：taking
D：took
答案(点此获取答案解析）
B
—Simon , what do I need to take for the hiking ?
—You'd better _____ more water than usual . It's hot today
A：to take
B：take
C：taking
D：took
的展开式中，各项系数之和为A,各项二项式系数之和为B,
,则展开式中常数项的值为