ABS制动防抱死系统执行器中,油泵的作用是()。
A.给系统油液增大压力
B.给车轮制动分泵增压
C.把系统油液泵回储液器
D.使电磁阀的油液局部增压
参考答案:C
下列各组物质中,在通常情况下不能发生化学反应的是
A.铁与硝酸银溶液
B.银与硫酸铜溶液
C.锌与稀硫酸
D.氢氧化镁与稀盐酸
Chinese doctors believe people who are too ______ should eat more yin foods. [ ]
A. weak and tired
B. stressed out and tired
C. stressed out and angry
D. angry and excited