晶体(crystal)

题目
名词解释题
晶体(crystal)
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相似问题和答案

第1题:

“水晶宫”(Crystal Paliac)


正确答案:1851年英国伦敦海德公园举行了世界上第一次国际工业博览会,由于博览会是在“水晶宫”展览馆中举行的,故称之为“水晶宫”国际工业博览会。

第2题:

晶核(crystal nucleus)


正确答案:是在种晶的基础上经过离子的集聚,形成的具有晶体基本结构的最初结晶体,它是指导晶体成长的基础。

第3题:

Theunderlinedword“crystal”inthepassagemeans_______.

A.岩石

B.火焰

C.水晶

D.寒冰


正确答案:C

第4题:

晶体(crystal)


正确答案: 内部质点(原子、离子)在三维空间周期性重复排列(即有序排列)的固体。

第5题:

arasporal crystal


正确答案: 伴胞晶体:少数芽孢杆菌,在形成芽孢的同时,会在芽孢旁形成一颗菱形,方形,或不规则形的碱溶性蛋白质晶体称为半胞晶体

第6题:

Charcot-Leyden结晶(Charcot-Leyden crystal)


正确答案:①常见于某些寄生虫病的嗜酸性脓肿内;②坏死组织中可见菱形或多面形蛋白性结晶;③系嗜酸性粒细胞中嗜酸性颗粒互相融合而成。

第7题:

苏云金杆菌是一类革兰氏阳性的昆虫病原芽孢杆菌。在芽孢形成期所产生的伴胞晶体也称-内毒素(Crystal protein)是其主要杀虫活性物质。


正确答案:正确

第8题:

共用题干
第二篇

Crystal Ear

One day a friend asked my wife Jill if I wanted a hearing aid."He certainly does,"
replied Jill.After hearing about a remarkable new product,Jill finally got up the nerve to
ask me if I'd ever thought about getting a hearing aid."No way,"I said."It would make me
look 20 years older.""No,no,"she replied."This is entirely different.It's Crystal Ear!"
Jill was right. Crystal Ear is different一not the old-styled body worn or over-the-ear aid,
but an advanced personal sound system so small that it's like contacts(隐形眼镜)for your
ears.And Crystal Ear is super-sensitive and powerlul,too.You will hear sounds your ears
have been missing for years.Crystal Ear will make speech louder,and the sound is pure
and natural.
I couldn't believe how tiny it is.It is smaller than the tip of my little finger and it's almost
invisible when worn. There are no wires,no behind-the-ear device. Put it in your ear and
its ready-to-wear mold(形状)fits comfortably. Since it's not too loud or too tight , you
may even forget that you're wearing it!Use it at work or at play.And if your hearing
problem is worse in certain situations,use Crystal Ear only when you need it.
Hearing loss,which occurs typically prior to teenage years,progresses throughout
one's lifetime.Although hearing loss is now the world's number one health problem,nearly
90 percent of people suffering hearing loss choose to leave the problem untreated.For
many millions,treating hearing loss in a conventional way can involve numerous office
visits,expensive testing and adjustments to fit your ear. Thanks to Crystal Ear,the
"sound solution"is now convenient.Almost 90 percent of people with mild hearing loss,
and millions more with just a little hearing drop-off(下降),can be dramatically helped with
Crystal Ear. Moreover,its superior design is energy-efficient,so batteries can last
months.Crystal Ear is now available to help these people treat their hearing loss with a
small hearing amplifier(放大器).

One special feature of Crystal Ear is that
A:you can control its volume.
B:you needn't take it off every day.
C:it is solar-powered.
D:it saves power.

答案:D
解析:

第9题:

胶体/晶体渗透压(colloid/crystal osmotic pressure)


正确答案:由血浆中胶体可溶颗粒形成的渗透压。

第10题:

伴孢晶体(parasporal crystal)


正确答案: 某些芽孢杆菌,如苏云金杆菌,在细胞内产生一种晶体状多肽类内含物称之。