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某女病人，28岁，结婚5年未孕，月经初潮12岁，月经周期25～45天，经期8～9天，月经量时多时少，无痛经。妇科检查无异常，基础体温呈单相曲线。

最可能的诊断是下面的哪一项（）。

A.有排卵性功血

B.无排卵性功血

C.排卵期出血

D.黄体功能不全

E.子宫内膜不规则脱落

答案

参考答案：B

阅读理解

任务型阅读。

    Welcome to Maxwell’s superstore. Maxwell’s superstore is the largest store in the town. You may find everything you want in the store. Women’s wear and children’s wear are on the first floor. Men’s wear and sporting goods are on the second floor. On the third floor are the electrical goods and furniture. On the fourth floor are traveling goods and books. Toys are on the fifth floor and there is a restroom just beside it. There is even a restaurant on the top floor. On each floor there is a cashier(收银员). You may pay at any of them. There is a large parking behind the store, which can hold 200 cars at the same time.

1. Is Maxwell’s shopping mall the largest in the town?

                                                  

2. How many floors does the superstore have?

                                                

3. What’s on the third floor?

                                                

4. Where can you play?

                                                

5. What do you think of this superstore?

                                                

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填空题

如图所示，取2块玻璃片放在桌面上．另取2块白色的小纸条，分别用浓氨水和酚酞试液浸湿后贴在玻璃片上，然后罩上烧杯．请回答：

（1）氨水是氨气（NH3）的水溶液，那么浓氨水应属于　    　（填“纯净物”或“混合物”）．

（2）几分钟后，可观察到滴有酚酞的纸片变红色．表明分子具有　     　的性质．
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