Question 1: The charged particles released by the nuclear battery are collected by semiconductors to form current and recycled, so that the nuclear battery does not need to be charged.

Question 2: List the figures and compare them. By comparing the number of columns, the characteristics of nuclear battery such as small volume and sufficient power are clearly explained.

Question 3: Replace the easily damaged solid semiconductor in the nuclear battery with the liquid semiconductor that is not easily damaged.

Question 1: Analysis of test questions: As you can see from the selected text, the second paragraph introduces "How did the myth come into being?" , which is the answer to this question. The key sentence is "scientists have found that when radioactive substances decay, charged particles can be released, and if special methods are adopted, charged particles can be tamed to form current." What method can you know according to the following introduction? According to these data, it can be summarized as "in my own words": using semiconductors to collect charged particles released by nuclear batteries to form current and recycle it, so that nuclear batteries do not need to be charged.

Comments: To understand the content of the article, we must combine the full text and grasp it as a whole.

Question 2: Analysis of test questions: Read "Circular nuclear battery developed according to new ideas, diameter 1.95 cm, thickness 1.55".

Millimeter, only a little bigger than 1 cent coin, but the power is 1 10,000 times that of ordinary chemical batteries.

It is difficult to see that there are several numbers in it, and there are also "than, but, times", so it is a column of numbers for comparison and application.

Compared with the figure, it highlights the characteristics of small size and sufficient power of the nuclear battery.

Comments: For the explanation method of expository writing, we must first know what it is, that is, example, figure, comparison, metaphor, classification and definition. Secondly, we should know its characteristics and functions. In the usual reading, we should constantly strengthen the practice. In addition, the function of the method consists of the keyword of the effect and the function of its content. Effect keywords, such as accurate, specific, vivid and clear explanation, generally prove the sentence before the sentence by explanation, mostly prove the central sentence of this paragraph. In other words, there are rules to follow in explaining the methods and functions.

Question 3: Test analysis: First find the answer range of the question. The answer to this question should be the third paragraph. After reading this part of the article, it is not difficult to find relevant sentences and obvious language symbols. "I came up with a clever plan to" slim down "the nuclear battery." The answer can be extracted from the following sentence.

Comments: To extract information from the text, we must find a suitable range, then look for completeness from front to back, and refine and summarize relevant answers according to understanding.