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问题 选择题

下列实验或生产操作：①蛋白质溶液中加入硫酸铵形成沉淀；②二氧化氮经加压凝成无色液体；③石蜡催化裂化；④碘受热变成碘蒸汽；⑤照相底片被感光。其中，没有新的物质生成的是                                  （   ）

A．①④

B．②③

C．①③⑤

D．①②④

答案

答案：A

单项选择题

治疗气病的八会穴是（）

A．中脘

B．太渊

C．膻中

D．悬钟

E．章门
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填空题

根据短文内容和所给的中文提示,在空白处填入.

    Daming and Lingling are going to Los Angeles for summer holiday. There will be lots of activities for

 them. Summer English_____1    (课程)will be    2   (提供). They will start at the    3      (开始)of

July and August. The teachers are well-trained and very    4       (有经验的),they will check if all the

students are    5    (出席的)or       6       (缺席的)every day. Students will have    7    (每周的)

test. They  can stay with American families to take part in American life or choose hotel       8        (住宿). If you are also       9     (感兴趣的) in it, you can come and fill in the      10     (申请)form.
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