碱性焊条使用前需经烘干方可使用，酸性焊条不必烘干。（）_爱下问搜题

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问题判断题

碱性焊条使用前需经烘干方可使用，酸性焊条不必烘干。（）

答案

参考答案：错

实验题

某兴趣小组做以下实验探究分子的运动：

(1)实验（如图甲所示）：烧杯B中出现什么现象：_____________。产生这一现象的原因是________。

(2)为使实验结论准确可靠，该兴趣小组设计了实验（如图乙所示）作为对比实验，你认为有无必要？_______，说明理由：________________。

阅读理解

阅读下面的短文，选择正确的答案。
What is a good friend like?

Molly	May19, 2009, 9:32pm I think a good friend likes to do the same things as me. Jack is my best friend. We both like to play the guitar after class.
Holly	May19, 2009, 9:40pm For me, a good friend makes me laugh. He or she likes to talk about something interesting and funny.
Maria	May19, 2009 9:45pm I think a good friend should be a good listener ,and he or she should keep secrets for me, that's more important for me.
Sally	May19, 2009, 9;55pm In my opinion, a good friend should have cool clothes, and he or she is popular in school. He or she should be good at sports, because I like doing sports.
Toby	May19, 2009, 10:16pm As we are students, I think a good friend should be good at schoolwork. Then we can help each other, learn from each other.
Jim	May19,2009,10:30pm I think a good friend should help each other. When I am in trouble, Kelly always help me.

1. Who can be Holly's friend?
    A. Someone who is very quiet.
    B. Someone who likes to talk about interesting things
    C. Someone who is good at schoolwork.
    D. Someone who is very cool and popular.
2. Which is Maria's opinion about a good friend?
    A. A good friend should like telling jokes.
    B. A good friend should study with her.
    C. A good friend should help her.
    D. A good friend should keep secrets for her.
3. Who wants his or her friends to do well in the schoolwork?
    A. Molly
    B. Toby
    C. Jim
    D. Sally
4.What does Jack like?
    A. Playing the guitar
    B. Sports
    C. Making others laugh
    D. Schoolwork