栅渣量只与栅条间隙的大小有关，而与地区特点、废水流量以及下水道系统的类型无关。
参考答案：错
We like learning French, _____ we may never go to France. [ ]
A. in case
B. however
C. even though
D. since
图4中，属于温带水果的是
