劣质防冻液,无法保证车辆正常运行,会引起()、()和发动机系统腐蚀或()等问题。
参考答案:水箱;水泵;冻裂
On the 40th Earth Day, Dr Wang gave us a talk on the importance of ______ the earth. [ ]
A. practicing
B. preventing
C. polluting
D. protecting
安胃饮2功效与作用