如图为“XX泉水”商标的一部分,下列说法正确的是( )
A:该泉水中不含任何化学物质
B:其中钙、镁、钾等是指这些元素的单质
C:该泉水常温下呈弱酸性
D:商标中体积的单位“ml”书写不规范
如图直三棱柱ABC﹣A1B1C1的体积为V,点P、Q分别在侧棱AA1和CC1上,AP=C1Q,则四棱锥B﹣APQC的体积为( )
He asked I would come to his party next week.
My hometown
Hello, I'm John. Let me show you around my hometown.