两种物品各自的性质互相产生有害的作用,这属于货物性质中的()。
A、耐温性
B、耐湿性
C、互抵性D
、易腐性
参考答案:C
一次函数y=ax+b的图象过点(0,-2)和(3,0)两点,则方程ax+b=0的解为______.
The ______ Approach believes that the student is a negotiator, communicator, contributor and an independent learner of the class.