更多"Night of the Living Ants When an a"的相关试题:
[单项选择]
Night of the Living Ants
When an ant dies, other ants move the dead insect out of the nest. This behavior is interesting to scientists, who wonder how ants know for sure and so soon that another ant is dead.
Dong-Hwan Choe, a scientist at the University of California found that Argentine ants have a chemical on the outside of their bodies that signals to other ants. "I’m dead. Take me away." But there’s a twist to Choe’s discovery. These ants are a little bit like zombies (僵尸). Choe says that the living ants, not just the dead ones, have this death chemicals. In other words, while an ant crawls around, perhaps in a picnic or home, it’s telling other ants that it’s dead.
What keeps ants from hauling away the living dead Choe found that Argentine ants have two additional chemicals on their bodies, and these tell nearby ants something like, "Wait-I’m not dead yet." So Choe’s research turned up two sets of chemical signals in ants:
A. A chemical that contains poison.
B. A chemical that causes death.
C. A chemical that announces death.
D. A chemical that prevents deat
[填空题]How can you protect other people when you have a cold
______ with a tissue when you cough or sneeze at least.
[单项选择]In which way are the ants different from other non-human societies
A. They do not need to search for food.
B. They do not need to look for shelter.
C. Individuals vary in social status.
D. Individuals perform different functions.
[单项选择]When a person dies, his debts must be paid before his （） can be distributed.
A. paradoxes
B. legacies
C. platitudes
D. analogies
[填空题]Vent life dies quickly when exposed to light.
[单项选择]How long （） each other when they got married
A. had they known
B. have they known
C. would they know
D. did they know
[单项选择]When will they meet each other
[简答题]On the other hand, when one is seated at a conference table before a meeting or at a dinner with a person whose good regard must not be forsaken, less may in fact be less. So what should your face be doing I’m against fake smiling, although I indulge in it all the time. Beyond binge drinking, it’s the business activity that ultimately inflicts the most physical damage. We’ve got to find something other than smiling to get the job done. But what else is there There’s frowning persively, if you can pull that off without looking indisposed. There’s a bemused mini-grin, which doesn’t break all the bones in your face and conveys good will at least. There’s blank affability, which, with good eyebrow work, can serve over the course of an entire dinner. But I admit it. This is a tough one that we’ll have to work out later. Until something better is found, smiling convincingly and in a variety of manners still rules.
[简答题]But, as has been true in many other cases, when they were at last married, the most ideal of situations was found to have been changed to the most practical. Instead of having shared their original duties, and as school-boys would say, going halves, they discovered that the cares of life had been doubled. This led to some distressing moments for both our friends; they understood suddenly that instead of dwelling in heaven they were still upon earth, and had made themselves slaves to new laws and limitations. Instead of being fleer and happier than ever before, they had assumed new responsibilities; they had established a new household, and must fulfill in some way or another the obligations of it. They looked back with affection to their engagement; they had been longing to have each other to themselves, apart from the world, but it seemed they never felt so keenly that they were still units in modem society.
[填空题]Cities cease to be port cities when other functions dominate.
[填空题]When asked that other books were among the prisoners’ favourites______.
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When students from other countries come to the United States ,they are sometimes shocked at the casualness in American college and university classes. For example, American professors do not dress up and they generally call students by their first names. Students can speak out in class, where they do not even need to raise their hands. In addition, in many schools, students can drink coffee, tea, juice, or soft drinks during classes. Foreign students can usually get used to these differences easily. However, two examples of American casualness are very difficult for some foreign students to understand. First, students sometimes call their teachers by their first names. Instead of calling a teacher Mr. Smith or Professor Adams, they call them Tom or John. In some countries, it is not possible for students to" first name" their teachers. Second, American students sometimes criticize the ideas of their teachers. They might also give their teachers suggestions about changin
A. Disrespectful.
B. Happy.
C. Relaxed.
D. Relieved.
