题干

做氧气的性质探究时,我用了如下图所示的操作流程。

本流程我探究的内容是____,C操作中为了使物质与氧气完全反应,我的操作方法是____,D操作中用烧杯倾倒的液体是____ ,得出的探究结论是____

上一题 下一题 0.0难度 选择题 更新时间:2019-01-23 10:24:04

答案(点此获取答案解析)

\u6728\u70ad\u5728\u6c27\u6c14\u91cc\u71c3\u70e7\u751f\u6210\u4ec0\u4e48,\u5c06\u52a0\u70ed\u5230\u53d1\u7ea2\u7684\u6728\u70ad\u7531\u96c6\u6c14\u74f6\u53e3\u5411\u4e0b\u7f13\u6162\u63d2\u5165,\u6f84\u6e05\u7684\u77f3\u7070\u6c34,\u6728\u70ad\u57

同类题2

根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    When I was a little girl, my mom would say, “Half the fun of doing anything is sharing it with others.” ____ Friends and mates allow us to enjoy our successes and our joys, comfort us in our hard moments, and provide a mirror for us to learn more about ourselves. I've always looked at friends as the family we choose. They enrich our lives. As Robert Louis Steven once said, “____”.

    To be a good friend or partner, it's important to be a good listener. Hear what your friend or mate has to say first rather than jump to conclusions or get defensive. ____ When they hear their words repeated back to them, it can help them to realize what they said was not exactly what they meant to say.

    ____ You know the old golden rule, “Care for others the way you would like them to care for you.” The support of a friend during a tough time could make the difference between success and failure. Encouragement and confidence are the gifts that can help change a person's life.

    Take care, though, with whom you choose to have close relationship, for they can have a great effect on yourself – respect and life path. As someone once told me “____ They will either take you up or down.”

A. I am afraid so.

B. It is quite true

C. Friendship is the most important factor.

D. Sometimes it is useful to be their mirror.

E. A friend is a present which you give yourself.

F. The attitudes of your friends are like the buttons on a lift.

G. Patience, sympathy and understanding are also important qualities.