____ present our vacations are too short

今年是中俄“国家年”，两国在经济、文化等多方面进行了交流、合作。中俄两国进行文化交流  [ ]

A．有利于我国吸引他国的一切文明成果

B．有利于促进不同文化之间的沟通

C．可以证明中国文化比俄罗斯文化优秀

D．可以让世界承认中国是最古老的文明古国

下列除哪项外，均可选择胸部X线检查进行鉴别

A．胸腔积液是血性或脓性

B．大叶性肺炎或支气管肺炎

C．气胸或肺大泡

D．肺不张或肺实变

E．肺脓肿或肺肿瘤

抗真菌药的分类及代表药搭配正确的是（）

A.抗生素类-克霉唑

B.唑类-伊曲康唑

C.烯丙胺类-5-氟胞嘧啶

D.抗生素类-特比萘芬

E.烯丙胺类-两性霉素B

用所给单词的适当形式填空

1.I don't know how learning in schools  ____  (differ) from learning in everyday life.

2. You should know sleeping in class is _____    (forbid).

3. The problem has been _____   (bother) me for weeks.

4. Ordinary people wouht then be able to use them to ____ (obtain) valuable information.

5. All the high managers should _____ (retire) at 55.

6. He raised an____  (object) to what I proposed.

7. We are working on the ____ (assume) that we can carry out the plan in a week.

8. After he ____  (retire) from politics, he settled in the countryside.

9. That's____   (mere) a dream.

10. The noise from the construction site at deep night is very ____(disturb). We've decided to

      do something against it.

1cm³的水中含有3.35×10²²个水分子，一个水分子的质量约为______ g（保留三位有效数字）