关于市场、成本、价格和价值的概念，说法不当的是（）。 A.价格、成本、价值等概念是资

水利工程建设项目质量监督期为( )。

A．从工程开工至工程完工

B．从办理质量监督手续至工程竣工验收

C．从办理质量监督手续至交付使用

D．从工程开工至工程竣工验收

关于经检验检疫不合格并已签发不合格通知单的出口货物，以下说法正确的是( )。

A．可以撤销报检，无须缴纳检验检疫费

B．可以撤销报检，须缴纳全额检验检疫费

C．不可以撤销报检，无须缴纳检验检疫费

D．不可以撤销报检，须缴纳全额检验检疫费

用所给词的适当形式填空

1. Grace studies in Beijing _______ (internation)school.

2. There are many _______ (build) in this old city.

3. Our classroom is on the ______ (two) floor.

4. They want              ______ (play) games with us.

5. Students always practice ______ (dance) in the dancing room.

6. There ______ (be) some tea in the big box.

7. My friends are from different _______ (country) but we are friendly each other.

8. Are there ______ (some) trees in front of the classroom?

9. That tall building is ______ (we) teaching building.

10. —May I borrow your color pen?

      —Sorry, I don’t have one, Lucy may have one,You can ask ______ (she).

皂甙是一类具有苦味的化合物．在（）中含量特别丰富。

A、谷类

B、豆类

C、肉类

D、蔬菜

装载机的轮式行走机构有哪些特点？