在速溶茶粉、浓缩茶汁中，致病菌均不得检出。（）
参考答案：对
通货膨胀对经济增长有着非常不利的影响，通货紧缩则不然。
He asked _____________ for the piano.
A．did I pay how much
B．how much I paid
C．I paid how much
D．how much did I pay
