凸透镜对光线有作用。(选填“会聚”或“发散”)

题型:填空题

问题:

凸透镜对光线有      作用。(选填“会聚”或“发散”)

考点:透镜及其分类
题型:填空题

某商住楼,建筑高度48m,每层建筑面积1490㎡,其地上部分防火分区允许最大建筑面积不应超过()㎡。

A.1000

B.1500

C.2000

D.3000

题型:填空题

根据句意,用括号中所给单词的正确形式填空。

1. Many              (climb) died on the half way to the mountain.

2. It's two              (hour) coach ride from here to the famous school.

3. Sandy finished              (read) the interesting book yesterday.

4. — What is school like?

    — It's like              (watch) TV.

5. The bike doesn't work now. It's              (use).

6. We are studying in a              (mix) school. Boys and girls have lessons together.

7. We can feel the              (beautiful) of her mother from the girl.

8. Playing computer games is one of his             (interesting).

9. Many wild animals face the problem of the              (lose) of living areas.

10. — Would you mind              (give) your seat to the old man?

      — Of course not.

11. I hope              (get) better grades in the next test.

题型:填空题

软件缺陷报告最重要的原则是 ______。

A.将问题说明白

B.记录好每一个缺陷

C.严格按执行步骤进行

D.提供全面信息

题型:填空题

企业系统规划(BSP)方法是一个转化过程,它将企业的战略转化为 【14】 的战略。

题型:填空题

小菜蛾的为害特点及防治方法?

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