[单选题]Lack of space forbids further treatment of the topic here.
A.prevents
B.receives
C.deserves
D.accepts

[单选题]Lack of space forbids further treatment of the topic here.
A.receives
B.deserves
C.prevents
D.accepts

[单选题]可抑制Th0细胞向Th2细胞转化的是

A.IL-5

B.IL-4

C.IFN-γ

D.TNF-α

E.IL-8

[单选题]the lack of service you experienced is unusual and not the standard of our motel, there is no excuse for a lackadaisical attitude on the part of any of our employees. We are sorry for the inconvenience and annoyance this incident caused. Thank you again for your comments. We hope that you will give us () chance to serve you.
A.other
B.other than
C.another
D.all

[单选题]Mary was frustrated by the lack of appreciation shown of her work.
A.puzzled
B.disturbed
C.disappointed
D.criticized

[单选题]Lack of money will have an adverse effect on our research programme.
A.delayed
B.quick
C.positive
D.unfavorable

[单选题]Poor health and lack of money may both be to educational progress roadblocks.
A.restraints
B.stains
C.scarcities
D.barriers

[单选题]If headaches only occur at night,lack of fresh air is often the cause.
A.start
B.begin
C.happen
D.visit

[单选题]_____often occurs because we lack self confidence and doubt our abilities .
A.Indecisiveness
B.Interference
C.Procrastination
D.Carelessness

[不定项选择题]资料：We all know that lack of sleep affects our memory along with other cognitive abilities. Sitting in the office sleep deprives it’s difficult to remember your own name, let along the ever-lengthening to-do list. But now new research shows that not getting enough sleep increases the chances your mind will actually create false memories. The study, published in Psychological Science, allowed one group of participants to get a full nights’ sleep while another had to stay up all night. In the morning they were given a series of photos that were supposed to show a crime being committed. Next, both groups were given some eyewitness statements about the crime. Like many witness statements in real-life crimes the details were different to those shown in the photographs. For example, in one instance the photo showed a thief putting a wallet in his jacket, but in the witness statement it said he put it in his pants（that's ‘trousers’ for British people not his underwear!）. Afterwards they were asked what they had seen in the original photographs. The results showed that those who'd missed out on their sleep were the most likely to regurgitate the false eyewitness statements they'd just read rather than remembering the ‘true’ crime-scene photos they'd been shown moments beforehand. The lack of sleep had messed with their heads to the extent the all the evidence—right and wrong—had got mixed up. One of the study's authors, Kimberly Fenn, said:”People who repeatedly get low amounts of sleep every night could be more prone in the long run to develop these forms of memory distortion. It's not just a full night of sleep deprivation that puts them at risk. Indeed, a preliminary study they carried out found that getting just five hours sleep was enough to cause people to start manufacturing false memories. What is best title of this article?
A.Sleep and Photographic memory
B.Lack of Sleep Leading to Crimes
C.Sleep and Cognitive of human beings
D.Lack of Sleep Producing False Memory

[不定项选择题]共用题干 Lack of Oxygen Delayed the Rise of Animals on Earth
Scientists have long speculated as to why animal species didn't flourish sooner,once sufficient oxygen covered the Earth's surface. Animals began to prosper at the end of the Proterozoic period,about 800 million years ago-but what about the billion-year stretch before that,when most researchers think there also was plenty of oxygen?
Well,it seems the air wasn't so great then,after all.
In a study published Oct. 3 1 in Science,Yale researcher Noah Planavsky and his colleagues found that oxygen levels during the"boring billion"period were only 0.1%of what they are today .In other words,Earth's atmosphere couldn't have supported a diversity of creatures,no matter what genetic advancements were poised to occur.
"There is no question that genetic and ecological innovation must ultimately be behind the rise of animals,but it is equally unavoidable that animals need a certain level of oxygen,"said Planavsky,colead author of the research along with Christopher Reinhard of the Georgia Institute of Technology.“We're providing the first evidence that oxygen levels were low enough during this period to potentially prevent the rise of animals."
The scientists found their evidence by analyzing chromium(Cr)isotopes in ancient sediments from China,Australia,Canada,and the United States.Chromium is found in the Earth's continental crust,and chromium oxidation is directly linked to the presence of free oxygen in the atmosphere.
Specifically,the team studied samples deposited in shallow,iron-rich ocean areas,near the shore.They compared their data with other samples taken from younger locales known to have higher levels of oxygen.
Oxygen's role in controlling the first appearance of animals has long vexed scientists."We were missing the right approach until now,"Planavsky said."Chromium gave us the proxy."
Previous estimates put the oxygen level at 40%of today's conditions during pre-animal times. leaving open the possibility that oxygen was already plentiful enough to support animal life.
In the new study,the researchers acknowledged that oxygen levels were"highly dynamic"in the early atmosphere,with the potential for occasional spikes. However,they said,"It seems clear that there is a first-order difference in the nature of Earth surface Cr cycling"before and af- ter the rise of animals.
"If we are right,our results will really change how people view the origins of animals and other complex life,and their relationships to the co-evolving environment,"said co-author Tim
Lyons of the University of California-Riverside."This could be a game changer."
"There's a lot'of interest right now in a broader discussion surrounding the role that environ- mental stability played in the evolution of complex life,and we think our results are a significant contribution to that,"Reinhard said. Tim Lyons liked to play computer games in his spare time.
A.Right
B.Wrong
C.Not mentioned