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 following questions.
Scientists have developed a new bionic computer chip that can be mated with human cells to combat disease. The tiny device, smaller and thinner than a strand of hair, combines a healthy human cell with an electronic circuitry chip. Doctors can control the activity of the cell by controlling the chip with a computer.
It has long been established that cell members become permeable when exposed to electrical impulses. Researchers have conducted genetic research for years with a trial-and-error process of bombarding cells with electricity in an attempt to introduce foreign substances such as new drug treatments or genetic material. They were unable to apply a particular level of voltage for a particular purpose. With the new invention, the computer sends electrical impulses to the chip, which triggers the physicians to open a cell’s pores with control.
Researchers hope that eventually they will be able to develop more advanced chips whereby they can choose a particular voltage to activate particular tissues, whether they be muscle, bone, brain, or others. They believe that they will be able to implant multiple chips into a person to deal with one problem or more than one problem.
The author states that scientists previously were aware that ___________.
A. electric impulses could affect cells
B. electric charges could harm a person
C. cells interact with each other through electrical charges
D. they could control cells with a separate computer
Đáp án A.
Key words: States, scientists, previously, aware
Clue: “It has long been established that cell members become permeable when exposed to electrical impulses”: Từ lâu giới khoa học đã nhận biết được rằng các tế bào trở nên bị thẩm thấu khi tác động bởi xung điện.
Như vậy chọn A. electric impulses could affect cells: xung điện có thế ảnh hưởng đến các tế bào.
Các đáp án khác không đúng:
B. electric charges could harm a person: tích điện có thể gây hại cho một người.
C. cells interact with each other through electrical charges: các tế bào tương tác với nhau qua điện tích.
D. they could control cells with a separate computer: họ có thể kiểm soát tế bào bằng một máy tính riêng.
| MEMORIZE |
| - expose (v): phơi bày, vạch trần, để lộ - to expose crime: vạch trần tội ác - to expose sb: vạch mặt nạ ai, vạch trần tội ác của ai - to expose sb to danger: đặt ai vào tình thế nguy hiểm |