改造环境的作用
参考答案:
高燥周围环境中的不利因素,保留有特点的因素.创造环境的作用:充分利用环境的有利因素,排除不利因素根据需要进行整体设计满足设计构思的总体设想.
—We really ______ the umbrellas. Look! It has cleared up.
—Well, we might as well take one with us, just in case. [ ]
A. don't need to bring
B. needn't have brought
C. didn't need to bring
D. need to bring
BAS给排水监控对象主要是水池、水箱的水位和各类水泵的工作状态。