关于物质和能源,下列错误的是( )
A:天然气是化石能源,属于不可再生能源,风能、水能等是可再生能源
B:太阳能利用可以光热转换、光化转换或光电转换,能量转化过程中总量保持不变
C:利用核裂变发电来代替部分用煤发电可以减少空气中PM2.5的污染
D:人们利用水力发电的途径获取电能会加剧温室效应
Hi, I'm Mary. I'm a pupil. I usually get up at six on weekdays. I have tea and bread for breakfast. I have two friends. One is Lucy and the other is Lily. Lucy often gets up at six thirty. She likes bread and milk. But Lily likes hamburgers and tea. She doesn't like milk at all.
***在《星星之火,可以燎原》中说:“他们这种理论的来源,主要是没有把中国是一个许多帝国主义国家相互争斗的半殖民地这件事认清楚。”为此***明确提出了 ( )
对食物中脂肪、蛋白质和糖类都能产生消化作用的是( )
—Is your sleeping problem getting better? —No. And . They gave me the wrong medicine this time. Can you believe that?