题目内容
（请给出正确答案）
CMA is being researched because it is thought to______.
A．be the only choice
B．have less side effect
C．be cheaper than other alternatives
D．be made from cheese whey
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更多“CMA is being researched because it is thought to______.A．be the only choiceB．have less sid”相关的问题
What does the author think about trying to find weaknesses in other people's research？
A．It should only be attempted by experienced researchers.
B．It may cause researchers to avoid publishing good work.
C．It is currently being done to excess.
D．It can be useful in planning future researc
A.Clusterin
B.Making a researc
C.Personal inventory.
D.none of the above
Lately, economists have added up the actual costs. The Environmental Protection Agency estimates that salt-induced road damage and vehicle corrosion cost $ 3 billion a year. That does not include damage to underground cables, which adds hundreds of millions to utility bills. Nor does it reflect the cost of brine leaking into porous water pipes, threatening the water supply. Salty water leaches into roadbeds, kills evergreens and poisons streams.
The various costs probably add another $ 2 billion to the national salt bill. Scientists estimate the full economic, or "life cycle," cost for a ton of salt at $ 500, or 20 times the $ 25 purchase price. That begins to make the switch to calcium magnesium acetate, perhaps the most promising alternative look practical. CMA, made from acetic acid and dolomitic(含白石的) lime, costs $ 600 a ton and has minimal adverse effect. Some researchers believe the cost can be halved by making CMA from waste cheese whey or pulp-mill effluent.
While CMA and other alternatives are being researched, many cities and states are cutting back on their use of salt. Keeping dispensing equipment in good repair helps reduce the amount spread.
Salt spread on road in winter may cause all the following problems except ______.
A．road damage
B．vehicle corrosion
C．damage of underground cables
D．car accident
A. asked
B. Researched
C. questioned
D. demanded
A.be satisfied with reinterpreting previous researc
B.avoid complicated business issue
C.concentrate on very narrow fields of stud
D.focus on topics no longer relevant to business need
A.A.Follow-up studies should last for one year.
B.B.Volunteers should get mentally prepare
C.C.Strategy training is a must in researc
D.D.Volunteers are provided with concrete advic
E.E.
In the author's opinion, who should do a lot of listening？
A．The book writers.
B．The researchers.
C．The parents.
D．The children.
Marconi moved to England because ______.
A．he did not get financial support for his research in Italy
B．he loved England
C．his research had to be conducted in England
D．his research fellow was in England
What does the word "that" stand for in the second paragraph？
A．Brain activity.
B．Her research findings.
C．The fact that cell phone use may cause cancer.
D．Her research progress.
What is the purpose of the interview？
A．TO make Doctor Cole well-known.
B．To do some research on space technology.
C．To introduce a new telescope.
D．To report what has been discussed at an astronomy meeting.
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