网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
sodium chloride equivalent
参考答案
更多 “ sodium chloride equivalent ” 相关考题
考题
When I first entered university, my aunt, who is an English professor, gave me s new English dictionary. I was __36___to se that it was an English English dictionary, also known as a monolingual dictionary._37___it was a dictionary intended for non—native learners, none of my classmates had one __38__, to be honest, I found it extremely __39_ to use at first. I would look up words in the dictionary and _40__ not fully understand the meaning, I wad used to the __41__ bilingual dictionaries, in which the words are _42__ both in English and Chinese ,i really wondered why my aunt __43_ to make things so difficult for me. Now ,after studying English at university for three years, I _44__ that monolingual dictionaries are __45_ in learning a foreign languageAs I found out, there is __46_ often NO perfect equivalence(对应)between two _47___ in two language. My aunt even goes so far as to 48___ that a Chinese “equivalent” can never give you the __49___ meaning of a word in English! ___50_ , she insisted that I read the definition(定义) of a world in a monolingual dictionary __51___ I wanted to get a better understanding of its meaning. ____52__, I have come to see what she meant.Using a monolingual dictionary for learners has helped me in another important way. This dictionary uses a(n) 53 number of words, around 2, 000, in its definitions. When I read these definitions, I am 54 exposed to（接触）the basic words and learn how they are used to explain objects and ideas. 55 this, I can express myself more easily in English.A．worriedB．sadC．surprisedD．nervous
考题
Which is the right way of listing salt content of 500 grams of bread?__________A.sodium: 32 gram
B.sodium: 320 milligrams
C.sodium: 3.2 gram
D.sodium: 320 gram
考题
共用题干
Solar Power Without Solar CellsA dramatic and surprising magnetic effect of light discovered by University of Michigan researchers could lead to solar power without traditional semiconductor-based solar cells.The researchers found a way to make an"optical________(51)",said Stephen Rand,a professor in the departments of Electrical Engineering and Computer Science,Physics and Applied Physics.Light has electric and magnetic_______(52).Until now,scientists thought the effects of the mag-netic field were so weak that they could be________(53).What Rand and his colleagues found is that at the right intensity,when light is traveling through a material that does not_________(54)electricity,the light field can generate magnetic effects that are 100 million times stronger than previously expected.Under these circumstances,the magnetic effects develop strength_________(55)to a strong electric effect."This could lead to a new kind of solar cell without semiconductors and without absorption to produce charge separation,"Rand said."In solar cells,the_________(56)goes into a matenal,gets absorbed and creates heat.Here,we expect to have a very low heat load.Instead of the light being absorbed,energy is stored in the magnetic moment.Intense magnetization can be induced by intense light and then it is ultimately capable of providing a capacitive power________(57)."What makes this possible is a previously unde- tected brand of"optical rectification",says William Fisher,a doctoral student in applied physics.In tradi- tional optical rectification,light's electric field causes a charge separation,or a pulling_________(58)of the positive and negative charges in a material.This sets up a voltage,similar to______(59)in a battery.Rand and Fisher found that under the right circumstances and in right types of materials,the light's magnetic field can also create optical rectification.The light must be shone through a________(60)that does not conduct electricity,such as glass.And it must be focused to an intensity of 10 million watts per square centimeter. Sunlight isn't this_______(61)on its own,but new materials are being sought that would work at lower intensities,Fisher said."In our most recent paper,we show that incoherent light like sunlight is theoretically almost _________(62)effective in producing charge separation as laser light is,"Fisher said.This new_________(63)could make solar power cheaper,the researchers say.They predict that with improved materials they could achieve 10 percent efficiency in converting solar power to usable energy.That's equivalent to today's commercial-grade solar cells."To manufacture modern solar cells,you have to do. _______(64)semiconductor processing,"Fisher said."All we would need are lenses to focus the light and a fiber to guide it.Glassworks for _________ (65).It's already made in bulk,and it doesn't require as much processing.Transparent ceramics might be even better."_________(55)A:reactiveB:preferableC:dueD:equivalent
考题
The Internet affords anonymity to its users,a blessing to privacy and freedom of speech.But that very anonymity is also behind the explosion of cyber-crime that has 1 across the Web.Can privacy be preserved 2 bringing safety and security to a world that seems increasingly 3?Last month,Howard Schmidt,the nation’s cyber-czar,offered the federal government a 4 to make the Web a safer place-a“voluntary trusted identity”system that would be the high-tech 5 of a physical key,a fingerprint and a photo ID card,all rolled 6 one.The system might use a smart identity card,or a digital credential 7 to a specific computer.and would authenticate users at a range of online services.The idea is to 8 a federation of private online identity systems.User could 9 which system to join,and only registered users whose identities have been authenticated could navigate those systems.The approach contrasts with one that would require an Internet driver’s license 10 by the government.Google and Microsoft are among companies that already have these“single sign-on”systems that make it possible for users to 11 just once but use many different services.12.the approach would create a“walled garden”n cyberspace,with safe“neighborhoods”and bright“streetlights”to establish a sense of a 13 community.Mr.Schmidt described it as a“voluntary ecosystem”in which“individuals and organizations can complete online transactions with 14,trusting the identities of each other and the identities of the infrastructure 15 which the transaction runs”.Still,the administration’s plan has 16 privacy rights activists.Some applaud the approach;others are concerned.It seems clear that such a scheme is an initiative push toward what would 17 be a compulsory Internet“drive’s license”mentality.The plan has also been greeted with 18 by some computer security experts,who worry that the“voluntary ecosystem”envisioned by Mr.Schmidt would still leave much of the Internet 19.They argue that all Internet users should be 20 to register and identify themselves,in the same way that drivers must be licensed to drive on public roads.5选？A.information
B.interference
C.entertainment
D.equivalent
考题
根据英文名（Sodium）写出对应的中文名。
热门标签
最新试卷