据处理中心的物理环境中,最佳湿度应该保持在什么样的程度?()
A、30%-40%
B、40%-50%
C、45%-60%
D、50%-70%
参考答案:C
根据所给单词写出正确形式
1. Where can we buy these ________(watch)?
2. He often ________(listen) to BBC in the morning.
3. Andy ________(not do) her homework sometimes.
4. I want to _________(buy)s new T-shirt.
5. Everyone _________(be) in the classroom.
6. How does she _________(do)it?
7. There is a _________(swim)pool in our school.
8. Would you like to go with ________(I) after school?
9. His father looks at his son ________(happy).
10. Don’t forget to come to ________(Millie) party.
法定检验、合同检验、公正鉴定和委托检验是商品检验机构实施进出口商品检验的分类形式。( )