潜水作业前,应充分了解作业现场的(),严格按照潜水作业安全技术操作规程作业。
A.水深
B.流向
C.流速
D.风速
E.水质
参考答案:A, C, D, E
Read and circle. 选出合适的单词。
1. Where does a panda (live/lives)?
2. I have fur, four legs and a tail. I can say woof. I am a (dog/duck).
3. The farmer (have/has)a camel.
4. Cows eat (grass/grasses) .
5. There are some apples _ (on/in)an apple tree.
交通事故的责任分为()。
A.全部责任
B.主要责任和次要责任
C.同等责任
D.无责任
E.次要责任