读日照图,完成各小题 此时,太阳直射在 A.120°W,23.5°S B.120°E,15°S C.120°W,15°S D.120°E,15°N 全球处
阅读下列材料,回答问题 材料一 最初,大量船只停靠黄浦江西侧的支流----上海浦附近,遂形成新的港口市镇上海镇。1292年设立上海县,治所为上海
I wrote _______ my brother last Saturday, but I haven’t heard _______him up to now.A.from; toB.to; ofC.to; toD.to; from
Many people travel to different places in the world by air. Usually it takes a long time, perhaps half a day, for passengers to stay in the plan. So airlines(航空公司)offer passengers food. Bu
从经济效益和环境保护考虑,大量制取硝酸铜最适宜采用的方法是( ) A.Cu+HNO3(浓)→Cu(NO3)2 B.Cu+HNO3(稀)→Cu(NO3
实施“走出去”战略是我国对外开放新阶段的重大举措,只有“引进来”与“走出去”同时并举,中国经济才能在更大范围内和更高层次上参与国际竞
(1)在充满CO2的铝制易拉罐中加入过量NaOH溶液后封口,易拉罐立即变瘪,原因 是_______________________________________;一会儿易拉罐又鼓起,因Al与NaOH溶液