“民以食为天”，人类生命活动所需的各种营养素主要来自于食物． （1）如表是小明制

具有激活淀粉酶作用的离子是（）.

A.钾离子

B.钠离子

C.氯离子

D.钙离子

E.镁离子

建筑同样是有生命，有它的生命史。它不仅发生、成长，而且会成熟、转换、兴亡。生命是灵动的，建筑也同样是灵动的，是一个活体，所以它才倾注有那么多人类的情感。情感是生命的确证。生命需要空间，建筑与空间更是无法割裂，空间是它生命的舞台。同样，生命拥有历史，建筑也是活在时间中的，离开了时空，无论生命还是建筑都不存在了。但托庇于时空，生命与建筑却可以超载出来，进入无限与永恒——而这，正是建筑美学所追求。对以上文字在原文中的作用推测最准确的一项是( )。

A．这段文字旨在论证建筑生命史

B．这段文字作为后文阐述建筑美学的引子

C．这接下来介绍建筑美学的历史渊源埋下伏笔

D．对前文关于建筑美学的论述进行总结

下列哪一项是控制有毒化学品危害的最佳方法?

A.隔离 

B.佩戴呼吸器具 

C.找较安全代替品

Questions 9-13

·You will hear five different opinions about friendship.
·For questions 9-13, choose from the list A-F what friendships mean to them.
·Use the letters only once. There is one extra letter which you do not need to use.
A. A real friend can share your happiness, accept and forgive faults.
B. Sometimes your best friend is yourself.
C. Family is more important than friends in his mind.
D. Friendship is more important than love.
E. A friend is someone who can understand you.
F. His best friend is his wife, because she knows what kind of mood
he is in.

Questions 9-13

·You will hear five different opinions about friendship.
·For questions 9-13, choose from the list A-F what friendships mean to them.
·Use the letters only once. There is one extra letter which you do not need to use.
A. A real friend can share your happiness, accept and forgive faults.
B. Sometimes your best friend is yourself.
C. Family is more important than friends in his mind.
D. Friendship is more important than love.
E. A friend is someone who can understand you.
F. His best friend is his wife, because she knows what kind of mood
he is in.

商业银行可以经营买卖政府债券、金融债券业务。134、