判断题 伯努利方程是流动系统的机械能衡算式，式中不包括内能项。

单项选择题 污水净化系统是先通过低温厌氧储水罐进行生物降解，再通过罐体周边的带有净化菌群的回填土二次净化处理。（ ）

不定项选择 English diphthongs are divided into both falling diphthongs (the first vowel sound is pronounced longer, louder and stronger than the second one), and rising diphthongs (the second sound is produced longer and stronger than the first