半深湖相
参考答案：
指位于波基面以下，浅湖区与深湖区之间地带的沉积相。
有耐磨性要求的混凝土优先选用硅酸盐标号≥325普通水泥，可使用标号≥325矿渣水泥，不得使用火山灰、粉煤灰水泥。( )
One day I _____ a newspaper article about the retirement of an English professor at a nearby state college.[ ]
A. came across
B. came about
C. came out
D. came to
