《北京味道》是北京电视台的大型人文美食纪录片，它记录了这座城市有关唇齿之间、味蕾之中

12的相邻数是（    ）和（    ）。

阅读理解。

     Today is Friday. The students on duty come to school early. They clean the classroom and the

blackboard . Then they put the desks and chairs in good order (顺序) . One of them takes down

(取下) an old map and puts up a new map of world on the wall . After all this, all the students come.

They sit in a nice classroom.  Mr Zhou is very glad to see the clean classroom. He thanks them for it.

1.Today ______ clean the classroom .

A .all the students

B. some students

C. one student

D. the teacher

2. When class begins, the classroom is ______.

A. in good order

B. on duty

C. big

D. not clean

3.How does Mr Zhou feel when he sees the clean classroom ?

A. sad

B. angry

C. glad

D. sorry

企业因为异地产品展销，最适宜开办的账产是( )。

A．基本存款账户

B．一般存款账户

C．临时存款账户

D．专用存款账户

温度梯度

氯气干燥前如不进行冷却除水，（）量增大，且放出的热量使干燥操作无法进行。