液硫管线堵时，可通过提高伴热线温度，加强排水，溶解硫磺的途径来解决。
参考答案：对
The teacher, along with some students, _________ a plan for the coming holiday.[ ]
A. have made
B. has made
C. are making
黄土高原生态建设，改善环境不恰当的措施有（ ）
A．植树种草，提高植被覆盖率
B．建梯田，修挡土坝
C．陡坡地退耕还林、还草，过度放牧的地方减少放牧的牲畜数量
D．开发荒坡、草坡，扩大耕地面积
