3÷(1-13-12),
=3÷16,
=18(米).
答:这条绳子原来是18米.
蛔虫病流行范围广、感染率高的原因不包括()
A.蛔虫生活史简单
B.雌虫产卵量大,虫卵抵抗力强
C.粪便管理不当
D.蝇、蟑螂机械性携带感染期病原体
E.入食未熟动物肉的习惯
She is such an irritating woman, I don’t know how you can ______ her.
A.put up
B.stand with
C.stand up to
D.put up with