澄清池的排泥措施,能不断地排除多余的陈旧泥渣,其排泥量应远远小于新形成的活性泥渣量。
参考答案:错
Debbie got up early last Saturday morning. She wanted to go skating in the Green Park w 小题1: some of her friends. She was very h 小题2: about it.
As soon as she was ready, she got on her bike and l 小题3: for the park —---- it was on the other side of the town.
Suddenly, as she was riding fast, she h 小题4: the sirens (警笛).The sound of the sirens was g小题5:closer and closer. So Debbie looked behind to see what was h小题6: .
As a result (结果), she f小题7: off her bike and lay in the middle of the road. Luckily, Debbie wasn’t hurt, b 小题8: a car hit her bike.
After the car stopped, two men got out and started running. Just then a p 小题9: car stopped and three policemen got out and started running a小题10: the two men. One of the policemen shouted, “Stop the thieves (贼)!”
At the same time a policeman came to see Debbie. He thanked her because, in a way, she had helped them catch the thieves.
在国际手语中,大拇指压住小拇指,其余三指伸直表示数字()。
A.1
B.3
C.6
D.9