氧化氮压缩机与齿轮箱用（）来连接。
A.NZ挠性爪联轴器
B.万向联轴器
C.柱销联轴器
D.凸缘联轴器
参考答案：D
________ tomorrow, our ship will set sail for Macao.[ ]
A. However the weather is like
B. However is the weather like
C. Whatever is the weather like
D. Whatever the weather is like
通风量与通风房间体积的比值称为（）。
