通货膨胀带来价格的全面上涨，这些商品的价值量（ ）
A．不变
B．变大
C．变小
D．可能变大也可能变小
A
在污水处理系统之前设调节池是为了调节（）
A.水质
B.水量
C.水量和水质
The achievements of the greatest minds in science could never have been reached if it had not been for the patient and accurate work of hundreds of other people.
A．has it not been
B．if it had been
C．if hasn't been
D．had it not been
