【简答题】听句子,从所给的A、B、C三个选项中选出一个最佳应答。 ( )1. A. I'm sure you will. ( )2. A. By four o'clock. ( )3. A. It's hard to say. ( )4. A. Of course we can. ( )5. A. Thank you. B. It's frustrating. B. ...
【简答题】阅读理解。 Dear John, I get your letter from my teacher. I'm happy to know you. My name is Jack. I am fif. I live in Beiji ng.I am a student of No. 1 Middle School. I'm in Class 3. My teacher is Miss L...
【简答题】听句子,选择正确答语。 ( )1. A. Oh, I'm not happy. B. The same to you. C. We are all happy. ( )2. A. Yes, it is. B. You're right. C. Thank you. ( )3. A. By bike. B. I don't want to go to school today...
【多选题】关于各种活性污泥运行方式,下列说法正确的是:
A.
吸附再生法不适合处理溶解性有机物含量较高的废水
B.
渐减曝气法克服了普通曝气池供氧与需氧之间的矛盾
C.
完全混合式曝气池克服了传统推流式曝气池不耐冲击负荷的缺点
【多选题】关于各种活性污泥运行方式,下列说法正确的是
A.
渐减曝气法克服了普通曝气池供氧与需氧之间的矛盾;
C.
吸附再生法不适合处理溶解性有机物含量较高的废水;
D.
完全混合式曝气池克服了传统推流式曝气池不耐冲击负荷的缺点。