再生时如再生液浓度太大,反而会使再生效果降低,原因是()
A、使双电层中的扩散层受到压缩,活动范围变小
B、使双电层中的扩散层变大
C、使双电层中的扩散层改变
参考答案:A
I asked the tailor to make a small _____ to my trousers because they were too long.
A.change
B.variation
C.revision
D.alteration
几种线路同杆架设时必须保证电力线路在通讯线路下面,高压线路在低压线路的上方.