我国主要的玉石产地有辽宁岫岩、河南独山、新疆和田。
参考答案:对
词汇运用。
1. (没有一个) of us has been to the USA.
2. Our solar system is only a (部分) of the galaxy.
3. Are we (孤独的) in the universe?
4. Their light has traveled several years to (到达) us.
5. I hope to meet a (真正的) astronaut one day.
6. We are good friends because we like the (相同的) things.
7. What (外国的) language have you studied recently?.
8. People in China and (国外) have given money to help poor children.
9. He stopped going to school a (少数) years ago.
10. That (听起来) interesting.
对未成年工和女职工的职业卫生保护,正确的是()
A.不得安排月经期妇女从事冷水作业和重体力劳动
B.不得安排未成年工从事接触职业病危害的作业
C.不得安排孕期的女职工从事对本人和胎儿有危害的作业
D.不得安排哺乳期的女职工从事对本人和婴儿有危害的作业