【单选题】Researchers have been able to make some assumptions about the construction of Greek theaters. For instance, it is known that construction work was usually undertaken on hillsides, where architects cou...
【判断题】Scientific manuscripts are usually written for a very small number of other researchers working in the same field; therefore there is no need to explain any scientific terms.
【单选题】Most people feel lonely sometimes, but it usually lasts only between a few minutes and a few hours. This kind of loneliness is not serious. In fact, it is quite normal. For some people, though, loneli...
A.
There are three different kinds of loneliness.
B.
Chronic loneliness is the most severe kind.
C.
Researchers want to cure loneliness.
D.
There is some difference between being alone and being lonely.