Vì sao giữ gìn thiên nhiên hoang dã là góp phần giữ cân bằng sinh thái?

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 word they in the first sentences of the third paragraph refers to _________

A. chips

B. tissues

C. voltages

D. researchers

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 word “eventually” in the third paragraph is closest in meaning to _________

A. in the future

B. especially

C. possibly

D. finally

Trong các kiểu phân bố cá thể của quần thể, kiểu phân bố ngẫu nhiên thường gặp khi

A. điều kiện sống phân bố đồng đều và không có sự cạnh tranh giữa các cá thể trong quần thể.

B. điều kiện sống phân bố không đồng đều và giữa các cá thể không có sự hỗ trợ lẫn nhau.

C. điều kiện sống phân bố đồng đều và kích thước quần thể ở mức vừa phải.

D. điều kiện môi trường phân bố ngẫu nhiên và không có sự cạnh tranh giữa các cá thể trong quần thể.

Hãy quan sát hình 66 rồi hoàn thiện các câu dưới đây vào vở bài tập.

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