City Park is not far away from here. It's only ten m____ walk. You can't miss it.
62÷7=____……____
要使两物体间的万有引力减小到原来的 14 ,下列办法可采用的是( )
欣赏以下水资源的漫画,回答各问题:
图甲 图乙
——I took lots of photos in Hainan.——Really? Could you show ______ to me?
植物
花生
苹果
西瓜
沙枣
适宜的pH范围
5.0~6.0
5.0~6.5
6.0~7.0
8.0~8.7