Question

1 In the first paragraph, the writer says that the nano-spider A is much thicker than a human hair. B cannot be seen under a microscope. C was invented by an individual scientist. D is an extremely small machine. 2 Why does the writer suggest nano-spiders can be classified as robots? A because they have the features of a robot B because they can walk C because they are built with computer chips D because they are microscopic devices 3 What does 'this' refer to in 1. 30? A the number of steps DNA walkers can manage B the walking distance a DNA walker can do C the length of the DNA walkers D the time each step takes for a DNA walker What do we learn about nano-spiders in the fifth paragraph? A They could protect our bodies from disease in future. B. They are already being used to fight cancer. C They have been used for various medical purposes in the past. D They have not actually been invented yet. What does the writer say about arguments against the use of nanotechnology? A People are concerned that it is used to build computer parts. People are concerned that nano-products are not tested before they are sold. B C There are concerns about whether the industry has strict rules for safety. D There are no concerns about nanotechnology in medicine. 6 All in all, the writer presents nanobots as devices which A we should be afraid of. B have already been in use for many years. C may be very useful in the future. D are mainly useful in industry.​

Answer 1

1. In the first paragraph, the writer provides information about the nano-spider and its characteristics. Let's go through the options:

- A. "Nano-spider A is much thicker than a human hair." This statement is correct based on the information in the paragraph. - B. "Cannot be seen under a microscope." This statement is incorrect. The nano-spider is visible under a microscope. - C. "Was invented by an individual scientist." The paragraph does not provide information about the inventor of the nano-spider. - D. "Is an extremely small machine." This statement is generally correct, as nano-spiders are described as extremely small.

Therefore, the correct answer for the first paragraph is option D.

2. The writer suggests that nano-spiders can be classified as robots because:

- A. "Because they have the features of a robot." This is a plausible answer, as the paragraph may describe features that are robot-like. - B. "Because they can walk." This is mentioned in the paragraph, but it might not be the sole reason for classifying them as robots. - C. "Because they are built with computer chips." The paragraph does not specify the use of computer chips in nano-spiders. - D. "Because they are microscopic devices." While this is true, the primary reason seems to be their robot-like features.

Therefore, the correct answer for why nano-spiders can be classified as robots is likely option A.

3. Regarding the reference to 'this' in 1.30, we need to look at the context:

- A. "The number of steps DNA walkers can manage." This is not clear from the provided text. - B. "The walking distance a DNA walker can do." This is not specified in the paragraph. - C. "The length of the DNA walkers." This is a possibility as the paragraph talks about the thickness and size of the nano-spider. - D. "The time each step takes for a DNA walker." This is not mentioned in the paragraph.

Based on the context, option C ("the length of the DNA walkers") seems to be the most appropriate.

4. In the fifth paragraph, we learn that nano-spiders:

- A. "Could protect our bodies from disease in the future." This is not mentioned in the paragraph. - B. "Are already being used to fight cancer." This is not explicitly stated; it mentions potential medical uses. - C. "Have been used for various medical purposes in the past." This is a possibility based on the paragraph. - D. "Have not actually been invented yet." This is contradicted by the paragraph, which discusses their potential medical applications.

Therefore, the most accurate answer is likely option C.

5. Regarding arguments against the use of nanotechnology:

- A. "People are concerned that it is used to build computer parts." This is not mentioned as a specific concern. - B. "People are concerned that nano-products are not tested before they are sold." This is a valid concern mentioned in the paragraph. - C. "There are concerns about whether the industry has strict rules for safety." This is a general concern mentioned in the paragraph. - D. "There are no concerns about nanotechnology in medicine." This is not supported by the paragraph.

Therefore, the correct answer is likely option B.

6. In conclusion, the writer presents nanobots as devices which:

- A. "We should be afraid of." This is not the main sentiment expressed in the paragraph. - B. "Have already been in use for many years." This is not explicitly mentioned. - C. "May be very useful in the future." This is a possibility based on the potential medical applications discussed. - D. "Are mainly useful in industry." This is not the main focus; medical applications are also discussed.

Therefore, the most fitting answer is likely option C.