Reading Comprehension TOEFL Exams 72

TOEFL Exams: Reading Comprehension - Lesson 72 (Đọc hiểu - TOEFL - Bài 72)

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Blood is indeed in the news, for on the heels of that announcement comes a report of tests carried out in the United States and Japan on artificial blood. After an accident, time is crucial for a person suffering from extensive blood loss, and a transfusion of real blood 5 must often be preceded by a time-consuming test for blood type. Plasma does not require such a test but, because it can carry little oxygen it is not a wholly satisfactory substitute. Perfluorocarbons appear to offer an answer. They are utilized in combination with and emulsion called Fluosol-DA, which provides a number of additional advantages 10 over real blood. These include the absence of need for blood tests, the fact that it can be frozen for as long as two years, its elimination eventually as a gas through the lungs, and the impossibility of its transmitting such problems as hepatitis.

 

1. What was the preceding paragraph probably about ?
(A) the benefits of a well-advertised food product
(B) the announcement of another blood-related development
(C) an account of the nature of real blood
(D) a description of other tests in the United States
2. Why, according to the passage, is a transfusion of real blood sometimes problematical ?
(A) because there is not enough time for a blood test
(B) because oxygen must be injected into the plasma
(C) because of the test necessitated by the use of plasma
(D) because of tests being carried out with artificial blood
3. What can be inferred from the passage about perfluorocarbons ?
(A) They are utilized in a plasma emulsion.
(B) They can carry considerable amounts of oxygen.
(C) They are injected pure into the patient.
(D) They require only a quick blood type test.
4. Which of the following is mentioned as being as advantage of Fluosol-DA over real blood ?
(A) It is a gas.
(B) Blood tests are not required for two years.
(C) It eliminates the risk of certain infections.
(D) It is an emulsion.
5. What would be the most suitable title for this extract ?
(A) Too many accidents : Blood loss increases
(B) Artificial Blood: A Vital time Saver
(C) Plasma a problem in blood transfusions
(D) More blood tests in the United States and Japan