如图所示,两端开口的弯管,左管插入水银槽中,管内外高度差为h1,右管有一段水银柱,高度差为h2,中间封有一段空气.则不正确的是( )
A:若大气压升高,h1减小
B:若环境温度升高,h2增大
C:若把弯管向上移动少许,则管内气体体积不变
D:若把弯管向下移动少许,则管内气体压强增大
战胜挫折和困难、获得成功,自信是基石,坚强意志是保证。( )
Much to our shock, none of the 100 people were able to________the gas blast, which brought great grief to their family.
(2015•广东)在绿色植物各项生理作用的叙述中,错误的是( )
已知ρ水=1.0×103kg/m3,ρ冰=0.9×103kg/m3.体积为1m3的水全部凝固成冰后,冰的质量为 ____ kg.水凝固成冰后体积____ (选填“变大”、“变小”或“不变”).