[判断题]

Formal language and informal language are different in a couple of ways.

[判断题]Formal language and informal language are different in many ways.

[单项选择]The formal instruction in second language acquisition （　）.
A. has no effect at all
B. has a powerful delayed effect
C. has very little effect
D. has unsatisfactory effect

[判断题]

People usually use formal language when they first meet someone.

[判断题]

Formal language is used in all kinds of writings.

[简答题]

The following four sentences present four different usages of the word 不过. Please discuss the distinctions and connections among the four usages, illustrating your points with your own examples where necessary.
1)不过二年，君必无患。
2)他十七岁就结婚，一年后当了爸爸，不过十八岁。
3)这是个乖巧不过的孩子。
4)我也没有长策，不过这种事情，其事已迫，不能计出万全的。

[判断题]Warranties can be used to achieve product differentiation.

[填空题]Body parts that gather fat are completely different in male and female.

[填空题]Scientists have long noted that the major difference between modem humans and other apes, like chimps, is our (26) of an oversize, energy-hungry brain. It was the development of that brain that drove the evolution of our early human (27) away from an apelike ancestor, starting roughly six million years ago. But the question of just why and how we (28) such big brains, which consume 20 percent of our energy, has long bedeviled science.
"A major difference in muscular strength between humans and nonhuman primates provide one possible (29) ," suggests a new study. The study, (30) Tuesday in the journal PLoS Biology, looked at how rapidly the metabolic needs of various organs, (31) our brains to our kidneys, have evolved. Some scientists have suggested that the rapidly evolving metabolism of the human gut, for example, drove the brain’s evolution. Instead, the new study suggests that muscles and brains have es