对于缀板式格构柱，单肢不失稳的条件是()，且不大于()

呼吸系统包括______和肺，肺是______的场所．

血涂片瑞特染色时，缓冲液常用的pH为（）

A.5.5～6.0

B.6.4～6.8

C.6.2～7.2

D.7.0～7.5

E.7.5～8.0

下列各句中加粗的成语使用恰当的一项是    [ ]

A．学习语文是一个长期积累的过程，不要指望用功一两天，就迅速立竿见影。

B．“枪手”写的年终总结之所以能过关，与很多单位的领导只是把年终总结当成一项必要但举足轻重的工作程序有关。

C．近一个月以来，中央五次出台房地产相关的宏观督控政策，政策之密集、力度之大、态度之坚决，史无前例。

D．贺岁电影《三枪拍案惊奇》中的喜剧元素，西方元素、时尚元素、春晚元素、二人转元素、网络元素一应俱全，但就是缺少了文化元素。

Our love of music and appreciation of musical harmony is learnt and not based on natural ability, a new study by University of Melbourne researchers has found. The researchers said previous theories about how we appreciate music were based on the physical functions of sound, the ear itself and a born ability to hear harmony.

The study shows that musical harmony can be learnt, and it is a matter of training the brain to hear the sounds. So if you thought that the music of some foreign culture (or Jazz) sounded like the crying of cats, it’s simply because you haven’t learnt to listen by their rules.

The researchers used 66 volunteers with a range of musical training and tested their ability to hear combinations of notes(音符) to determine if they found the combinations familiar or pleasing. They found that people needed to be familiar with combinations of notes. If they found the notes unfamiliar they also found the sound unpleasant. This finding put an end to centuries of theories claiming that physical functions of the ear determine what we find attractive.

The study found that trained musicians were much more sensitive to unpleasant notes than non-musicians. When they couldn’t find the note, the musicians reported that the sounds were unpleasant, while non-musicians were much less sensitive. This shows the importance of training or nurturing(培养) the brain to like particular sound of combinations of notes, like those found in jazz or rock.

Depending on their training, a strange chord(和弦) sound was pleasant to some musicians, but very unpleasant to others. This showed us that even the ability to hear a musical note is learnt.

To confirm this finding, they trained 19 non-musicians to find the notes of a random selection of western chords. Not only did the participants’ ability to hear notes improve rapidly, afterward they reported that the chords they had learnt sounded more pleasant -- regardless of how the chords were played.

The question of why some combinations of musical notes are heard as pleasant or unpleasant has long been debated. “We have shown in this study that for music, beauty is in the brain of the beholder(观看者)”, a researcher said.

小题1:According to the study, people find foreign music quite unpleasant because_____.

A．they hear the music much too often

B．they don’t like the person playing it

C．they have no idea about how to listen

D．they have no born musical ability at all小题2:Although non-musicians were less sensitive to music, they can still_____.

A．be trained to like particular music

B．make friends with real musicians

C．find the beauty of chords without training

D．enjoy the beauty of music when played by musicians小题3:The 19 non-musicians were trained in order to show_____.

A．the brain likes particular combinations of notes

B．not a strange note was pleasant to all musicians

C．how the chords were played was very important

D．people’s ability to hear a musical note can be learnt小题4:What is the main idea of the passage?

A．Love of musical harmony can’t be taught.

B．Love of music is not natural but nurtured.

C．Listening to music can improve your brain.

D．You can be a musician without being trained.

合适的体外培养实验室至少具备（）。

A.缓冲室和培养室

B.缓冲室

C.准备室

D.培养室

E.准备室和培养室