The author states that the kangaroo rat is known for all of the following EXCEPT .
A. the economy with which it uses available water.
B. living without drinking water.
C. breathing slowly and infrequently.
D. manufacturing water internally.
Giải bởi qa.haylamdo.com
Đáp án đúng là: C
Giải thích:
Dựa vào câu: Like other animals, he has the ability to manufacture water in his body by a metabolic conversion of carbohydrates.
But he is notable for the parsimony with which he conserves his small supply by every possible means, expending only minuscule amounts in his excreta and through evaporation from his respiratory tract.
Investigation into how the kangaroo rat can live without drinking water has involved various experiments with these small animals.
Dịch: Giống như các loài động vật khác, chuột túi có khả năng sản xuất nước trong cơ thể bằng cách chuyển hóa thành carbohydrate.
Nhưng chuột túi đáng chú ý vì sự tiết kiệm mà anh ta bảo tồn nguồn cung cấp nhỏ của mình bằng mọi cách có thể, chỉ thải ra một lượng rất nhỏ trong phân của anh ta và thông qua sự bay hơi từ đường hô hấp của anh ta.
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.
While most desert animals will drink water if confronted with it, for many of them the opportunity never comes. Yet all living things must have water, or they will expire. The herbivores find it in desert plants. The carnivores slake their thirst with the flesh and blood of living prey. One of the most remarkable adjustments, however, has been made by the tiny kangaroo rat, who not only lives without drinking but subsists on a diet of dry seeds containing about 5% free water. Like other animals, he has the ability to manufacture water in his body by a metabolic conversion of carbohydrates. But he is notable for the parsimony with which he conserves his small supply by every possible means, expending only minuscule amounts in his excreta and through evaporation from his respiratory tract.
Investigation into how the kangaroo rat can live without drinking water has involved various experiments with these small animals. Could kangaroo rats somehow store water in their bodies and slowly utilize these resources in the long periods when no free water is available from dew or rain? The simplest way to settle this question was to determine the total water content in the animals to see if it decreases as they are kept for long periods on a dry diet. If they slowly use up their water, the body should become increasingly dehydrated, and if they begin with a store of water, this should be evident from an initial high water content. Results of such experiments with kangaroo rats on dry diets for more than 7 weeks showed that the rats maintained their body weight. There was no trend toward a decrease in water content during the long period of water deprivation. When the kangaroo rats were given free access to water, they did not drink water. They did nibble on small pieces of watermelon, but this did not change appreciably the water content in their bodies, which remained at 66.3 to 67.2 during this period.
This is very close to the water content of dry-fed animals (66.5), and the availability of free water, therefore, did not lead to any "storage" that could be meaningful as a water reserve. This makes 35 it reasonable to conclude that physiological storage of water is not a factor in the kangaroo rat's ability to live on dry food.
What is the topic of this passage?
Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.
(A)Finding good jobs (B)are not easy (C)for young people if they are not (D)well – qualified.
When I _____, the film _______so I couldn’t see its introduction.
Quang Hai (A)hardly never misses (B)an opportunity (C)to play in the football (D)tournament.
Tom was wearing a suit, ______was unsuitable for an informal gathering.
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underline is pronounced differently from the rest.
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
I suggest that the doctor ______up his mind without delay.
Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
It’s a good idea, but I need time to think it over before I make a decision.
Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the rest in the position of the main stress.
Mark the letter A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
Her mother likes the head of cabbage rare.
Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underline is pronounced differently from the rest.
