题目内容
（请给出正确答案）
[主观题]
Explain why none of the lanthanoid sesquioxides, Ln2O3, is as acidic as Al2O3
Explain why none of the lanthanoid sesquioxides, Ln2O3, is as acidic as Al2O3
查看答案
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
Explain why none of the lanthanoid sesquioxides, Ln2O3, is as acidic as Al2O3
如果结果不匹配，请 联系老师 获取答案
更多“Explain why none of the lantha…”相关的问题
听力原文： Colds have always been a nuisance, and people have tried many strange ways to cure them, However, none have worked. one Roman historian even recommended kissing the nose of a hairy mouse (29) ! But up till now we are only a little closer to finding a cure for it.
Scientists have discovered that a cold is not caused by a single virus, but by many. They have proved that people under stress are more likely to catch colds, although why this happens is still unknown (30) . Experiments also showed that women suffer more colds than men. But again, scientists are unable to explain why this is so.
Another experiment proved that getting cold does not cause colds. For this experiment, one group of human volunteers were showered with water and then made to stand in a windy corridor. Another group remained dry and inside a heated room. While you might expect people in the first group to catch colds more easily, they didn't.
one other thing that we now know is that colds are spread by water vapor from breath. This would explain why colds are more common in the winter than at other times: people spend more time indoors closer to other people, and also away from flesh air (31) .
(30)
A．Keeping warm and dry.
B．Drinking a lot of liquid.
C．Living close to the hospital.
D．Kissing the nose of an animal.
Dr. J. Robinson found out about the phenomenon of self-controlled pain almost by accident. He was studying the effects of analgesics used to control pain during childbirth and as part of the experiment made it possible for women having their child to press a button which gave an automatic injection—instead of having all injections made by the doctor. Afterwards these women did not say that they had less pain than other women in childbirth, but they did use considerable less of the drug.
J. Atkins, a dental surgeon, has observed a similar phenomenon. As part of their efforts to make dentistry painless, Atkins and researchers at Aston University in Birmingham offered patients a switch they could flip to turn off the dentist's drill whenever they chose. But, after trying the switch on 50 patients Atkins gave up; none of the patients had ever flipped the switch.
Perhaps the extra endurance was because the Aston team also use other methods to make dentistry painless. Apparently few other dentists are so considerate. The end result, according to the Birmingham survey, is that British people avoid going to the dentist, with the consequence that almost 30% of people in England and Wales have lost all their teeth, and more than seven out of ten have lost at least six teeth. Less than half of the public pay regular visits to the dentist. To find out why, Atkins and psychologist Cumberbatch interviewed a sample of patients attending a dental hospital. The most common reason people gave for not having dental check-ups were fear and pain.
By using a little care and taking time to explain what will happen, Atkins feels, dentists could overcome these fears. There are techniques for giving injections without pain, and a "calm unhurried approach" to drilling can make that painless, too.
Sadly, few dentists seem to take much trouble with their patients. "I am not nervous when I go to the dentist, and I do not have any pronounced sympathy for those who are, " said one dentist. "I tend to take the point of view that they are being unreasonable at my expense."
The passage most possibly comes from______.
A．a medical textbook
B．a psychology textbook
C．a popular magazine
D．a serious magazine
A、Neither likes to study grammar
B、Neither likes a teacher to explain what they are learning
C、Both like to study independently
D、None of the above
A.interrupted
B.interruption
C.interrupt
D.interrupting
Why do you think the author wrote this passage？
A．To explain why language learning is difficult.
B．To teach people to speak English.
C．To compare language learning with other types of learning.
D．To encourage language learners to use these techniques.
(Witnesses) of the crime (find difficult) to explain (why) they (didn't) call the police.
A．Witnesses
B．find difficult
C．why
D．didn't
A.To explain why recycling is important.
B.To describe the recycling program.
C.To discuss whether or not recycling should be mandatory.
D.To explain how to find the recycling facilities.
Explain why nuclear magnetic resonance experiments show only one type of hydrogen atom in the
Which of the following cannot explain why the interior of the earth is fluid？
A．There is great pressure at the centre.
B．Earthquake waves can move vertically.
C．The outer layer is made of rock.
D．The heat at the centre is too great.
