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Which tripositive lanthanoid ion(s)is(are)most likely to react with chromium(II )chloride？ What products are expected？ Explain.
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更多“Which tripositive lanthanoid ion（s)is（are)most likely to react with chromium（II )chloride？ What pro”相关的问题
第1题
Which of the following are high-level languages？
A．COBOL, FORTRAN, ASSEMBLER, PASCAL.
B．MACHINE LANGUAGE, LIST, BASIC, PROLOG.
C．COMPILER, FLOW MATIC, ALGOL, LOGO.
D．None of the above.
第2题
Which of the following statements about TapeStore is NOT true？
A．It can store a large amount of information.
B．It is very cheap.
C．It is very fast.
D．It is secure.
第3题
A.Optical transmit unit (OTU)
B.Optical add/drop multiplexer (OAD)
C.4-channel 644M sub-rate convergence board(SRM42)
D.2-channel Gigabit Ethernet convergence board(GEM2)
第4题
Which of the following details in the news is CORRECT？
A．The rescue operation involved a large sum of money.
B．The cause of the outbreak has been confirmed.
C．Efforts to cease the spread of the disease were stopped.
D．The outbreak didn"t cause any deaths.
第5题
Which of the following is NOT true about the trumpet？
A．It has a long history.
B．It has a large family.
C．It produces a beautiful tone.
D．It is the most popular musical instrument.
第6题
Which is one way of controlling emotions？
A．To put them to the side to deal with later.
B．To use both logic and emotion.
C．To suppress the negative ones.
D．To hinder them.
第7题
Which of the following is TRUE？
A．I spent a long time finding the first job.
B．Four years later, I became an accounts manager.
C．I got interested in my third job.
D．I enjoyed being a TV program presenter.
第8题
Scientists now believe that between E1 Ninos there often are La Ninas: one-or-two-year periods when the surface water of the equatorial Pacific becomes cooler. Experts detected the onset of La Nina in the spring of 1988, leading some to link it to last summers' drought in the United States, flooding in Bangladesh, and the abnormal cold winter in Alaska and western Canada.
The early detection of E1 Ninos and La Ninas is an invaluable tool for long-range weather forecasting.
The best title for the passage would be ______.
A．E1 Nino
B．La Nina
C．La Nina or E1 Nino？
D．A Companion for El Nino
第9题
A. Stratus signs La Creciente exploration contract
Colombian company Stratus Oil ＆ Gas has signed an exploration and production contract with Colombia's hydrocarbons regulator ANH for the La Creciente block in the north of the country, Canadian company Pacific Stratus said in a statement Tuesday. Stratus Oil ＆ Gas is a wholly owned subsidiary of Gran Colombia Oil ＆ Gas, which Pacific Stratus Ventures (TSXV: PVL. H) is in the process of acquiring. La Creciente, formerly known as Guepaje Sur, is in Sucre department, and covers 40,764 acres in San Jorge basin. The Guepaje and Ayombe gas fields are close by, so if La Creciente reaches production it will need only a 2km auxiliary pipeline to link into existing transport infrastructure, the statement said.
B. Cartellone entering contract mining market
Argentine engineering and construction company Jos6 Cartellone Construcciones Civiles (JCCC) is entering the contract mining market, commercial representative Mariano Aranibar told BNamerieas. "We've been working on mining projects for about the last 10 years and we've had operating experience at one mine, moving around 230,000t/y of mineral," he said. The company has experience in earth moving as well as tunneling, and would be looking to work in either open-pit or underground situations, he added. "We have the machinery and qualified and experienced people who have worked in mining operations before in Argentina and Chile," he said.
C. Belgo considers investing US $ 606nm over 4 years
Brazilian long steelmaker Belgo-Mineira is considering a 1.8 bn-real (US $ 606mn) investment plan for the 2004--2007 period, mostly to improve and increase output capacity, a company spokesperson confirmed to BNamericas. The company is investing 480mn reais this year, of which 200mn reais have already been disbursed to double output capacity at its Piracicaba steel mill in Santo Paulo state to 1Mt/y, modernize its Vit6ria mill in Espirito Santo state and improve logistics. Investments for 2005 and 2006 are estimated at 470mn reais a year, with the remaining 430mn reais scheduled for 2007. The investment plan still has to be approved by the company board, the spokesman added.
D. IBM pushes for banking in retail sector
IBM is keeping a close eye on the region's retail sector due to the advances it has made in the last few years, regional financial services vice-president Ricardo Pelegrini told BNamericas. The retail chains have very strong assets, such as large customer databases and market intelligence, and they could use those assets to become strong competition for traditional banks, the executive said. "The store chain should look to this more as a business in and of itself, not just as a tag on its retail business," he said. IBM's retail area is following this industry in countries within the region, as it complements the company's financial services area to be able to improve the service offered to customers, he added.
E. Comsa wins 1st EFE 2003---2005 investment plan concession
Chile's state rail company EFE has awarded Spain's Comsa group the first concession contract that falls under its US $ 998mn investment plan for 2003--2005, EFE president Luis Ajenjo announced during a press conference Tuesday. The 16-year contract entails rehabilitating and maintaining the rail network's northern zone (Zona Norte). This zone covers the Alameda-Limache, Limache-Puerto Valparaiso, Alameda-Talagante, Talagante-Barrancas and Paine-Talagante stretches for a total of 376km. Comsa submitted a bid of US $ 32mri that corresponds to the rehabilitation works, which had a reference price of US $ 38mn. The other bidders were OHL, Azvi and Icil-icafal.
The company focuses its business on natural gas and oil.
第10题
Scientists say they've made a cool discovery about living longer.
Mice genetically engineered to have lower body temperatures live substantially longer than normal mice, researchers say in tomorrow's issue of the journal Science. The newfangled mice are only slightly cooler than standard — just 0.5 to 0.9 degrees Fahrenheit (0.3 to 0.5 degrees Celsius), an effect that occurs only during waking hours. But the temperature drop significantly increases the rodents' life spans, scientists say. Altered male mice live 12 percent longer on average, while females live 20 percent longer than regular mice.
"We've demonstrated that a modest but prolonged reduction of core body temperature can contribute to increased longevity," said lead study author Bruno Conti, a biologist and neuroscientist at the Scripps Research Institute in La Jolla, California.
Which animal did the scientists use for their experiments？
A．Mice.
B．Monkeys.
C．Dogs.
D．Pigs.
