夜间的粉红色和绿色泛光灯把瀑布映照得辉煌夺目.The waterfall was lit up at night with pink and green floodlights.外面, 夜间的宁静被各种异常的闹声所扰乱.Outside, the silence of the night was disturbed by many unusual noises.白天的度数和夜间的度数有什么差别 吗 ?Is there any differ...
An earthworm is a terricolous organism.蚯蚓是陆生的生物.The earthworm population had declined by 70 %.蚯蚓数量下降70%.The oral opening in an earthworm is small.蚯蚓的口是很小的....
Acids neutralize alkalis and vice versa.酸能使碱中和,碱亦能使酸中和.What's the scale that's used to compare the strength of acids and alkalis?用何种标准来比较酸碱度？Aluminium and other metals are normally badly corroded by alkalis.铝和其...