北美五大湖的水注入下列哪一组是正确的( )
A.密西西比河、入墨西哥湾
B.圣劳伦斯河、入大西洋
C.圣劳伦斯河、入墨西哥湾
D.密西西比河、入太平洋
答案:B
Speaker A: I can’t stand the school cafeteria. The food is terrible. Speaker B: ().
A. I agree with you. It’s quite difficult to find a seat in the cafeteria.
B. Yeah, you will feel more comfortable if you sit down.
C. Yeah, but that’s not the worst thing about it. It’s also very dirty.
D. I don’t see why they don’t supply some seats for us.
参数固态继电器可以()和各种敏感元件构成自动控制系统。
A.直接
B.有隔离