题目内容

钢轨产生裂缝是轨道变形的主要因素。

A. 对
B. 错

查看答案

搜索结果不匹配？点我反馈

更多问题

1. How long havethe Jouberts worked in Africa?

A. about 5 years
B. about 15 years
C. about 25 years

Toget near animals without scaring them, Dereckdresses as .

A. a lion
B. a zebra
C. a cheetah

Wheredo the Jouberts spend most of theirtime?

A. three months
B. three years
C. eight years

Wheredo the Jouberts spend most of theirtime?

A. at home.
B. in a tent.
C. in their car.