Tính các giới hạn sau:  lim x → + ∞   17 x 2   +   1

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

    A small but growing group of scholars, evolutionary psychologists, are being to sketch the contours of the human mind as designed by natural selection. Some of them even anticipate the coming of a field called "mismatch theory", which would study maladies resulting from contrasts between the modern environment and the "ancestral environment". The one we were designed for. There is no shortage of such maladies to study. Rates of depression have been doubling in some industrial countries roughly every 10 years. Suicide is the third most common cause of death among young adults, after car wrecks and homicides.

    Evolutionary psychology is a long way from explaining all this with precision, but it is already shedding enough light to challenge some conventional wisdom. It suggests for example, that the nostalgia for the nuclear family of the 1950s is in some way misguided-that the model family of husband at work and wife at home is hardly a "natural" and the healthful living arrangement, especially for the wives. Moreover, the bygone lifestyles that do look fairly by commercialism. Perhaps the biggest surprise from evolutionary psychology is it depiction of the "animal" in us. Freud, and various thinkers since, saw "civilization" as an oppressive force that thwarts basic animal instincts and urges and transmutes them into psychopathology. However, evolutionary psychology suggests that a large threat to mental health may be the way civilization thwarts civility. There is a gentler, kinder side of human

nature, and it seems increasingly to be a victim of repression in modern society

The word "by gone" could be replaced by 

A. overlooked 

B. forgotten 

C. past 

D. original 

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.

Why is text messaging so popular, especially with young people? There are two main reasons. One is cost, as many teenagers have to use pay-as-you-go mobile tariffs (25) _______ of contracts, and so it is cheaper to send a text message than make a voice call. So texters get better value of (26) _______. But there is a second, less practical reason for its popularity. A generation is growing up happy to communicate mostly by text, and this new form of instant communication is even more relaxed and informal than either email or phone calls. Text messaging has created a completely new language, (27) _______ of abbreviations and unusual spellings.

It is a language that is not understood by adults, even though they can buy special dictionaries explaining it, and it has opened up a huge generation (28) _______ between teenagers and their parents. For teenagers, text is convenient and quick, but it confuses parents. Text messaging is a teenage response to grown up technology and provide young people with a means of communicating that is always accessible. It is also something (29) _______ they can call their own, and in spite of some concern in the teaching profession that literacy skills are being lost text messaging is a form of communication that is certainly here to stay.

(Source: haps://enwikipediaorgAviki/Text messaging)

Điền vào số: 25

A. instead

B. in spite

C. as a result

D. in case

Cho biết mỗi gen quy định một tính trạng, alen trội là trội hoàn toàn và không xảy ra đột biến. Theo lí thuyết, phép lai nào sau đây cho đời con có tỉ lệ phân li kiểu hình là 3 : 1?

A. AABbDd × AaBBDd.

B. AabbDD × AABBdd.

C. AaBbdd × AaBBDd.

D. AaBbDd × aaBbDd.