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问题 选择题

下列现象中一定发生化学变化的是（　　）

A．牛奶变酸

B．干冰升华

C．玻璃杯打碎

D．海水晒盐

答案

A、牛奶变酸牛奶的过程中有新物质生成，属于化学变化；

B、干冰升华是二氧化碳由固态直接变成气态，属于物理变化；

C、玻璃杯打碎是形状的改变，属于物理变化；

D、海水晒盐是利用海水的蒸发，属于物理变化；

故选项为：A．

阅读理解

任务型阅读。

     Today is a fine day. Mr. Smith and his family are in the park now. On their right, there is a cafe. On their left, there

is a big lake. There is a small hill behind the lake.   Near the lake,   there is a sign.   It says,  " Don't swim in the lake!"

There is a beautiful garden in the middle of the park.   There are many flowers in it. Between the lake and the garden,

there are many tall trees and some small shops.

1.Where are Mr. Smith and his family now?

                                          .

2.Is there a small hill in the park?

                                          

3.What dose a sign near the lake say?

                                          

4.What's in the middle of the park?

                                          

5. Many tall trees and some small shops are         the lake        the garden.(根据短文意思在横线上填上合适的单词,

每空一词)
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多项选择题 案例分析题

男性，55岁。因进食哽噎感4个月入院。患者4个月前不明原因出现进食哽噎感，症状逐渐加重，近3周只能进全流质，体重下降5kg。体检：T36．2℃，P83次/分，BP145/88mmHg。消瘦体型，双侧锁骨上淋巴结未触及，气管居中，双肺呼吸音正常。

患者的诊断需要与哪些疾病进行鉴别诊断（）

A.反流性食管炎

B.食管憩室

C.纵隔淋巴结结核

D.食管腐蚀性狭窄

E.贲门失弛缓症

F.食管平滑肌瘤
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