题目

Bill wants _________ vegetable salad. A . have B . to have C . has D . to has 答案：B读下面等高线图，下列说法正确的是A、L1为山脊，L2为山谷 B、a为山顶，d为陡崖 C、b处比c处更陡 D、e处气温c处高