使用砂浆搅拌机，要先将料倒入拌筒中，再接通搅拌机电源。( )
参考答案：错
–How do you like Albert Einstein?
--________.
A．I like him very much
B．He invented “theory of relativity”
C．He is great and creative
D．His discoveries have affected our life
油压和油箱油位同时下降的原因有哪些？
