听力音频：
Questions 31-40
Complete the sentences below.
Write ONE WORD ONLY for each answer.
Background
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In many countries, the 31……….. plays a role in regulating the production and distribution of vegetables.
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One of the biggest challenges for vegetable farmers is controlling the growth of unwanted plants known as 32………..
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The 33……….. of a plant, including its stem and leaves, is essential for providing support and transporting nutrients.
Environmental Factors in Vegetable Growth
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Vegetables with high moisture content require a sufficient supply of 34……….. to grow properly.
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A modern agricultural 35……….. has made it easier to harvest vegetables efficiently on large farms.
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Some vegetables are typically planted in early 36……….. as the weather conditions are ideal for their growth.
Other Scientific Aspects
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The 37……….. of vegetable cultivation dates back thousands of years to ancient civilizations.
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Exposure to adequate 38……….. is essential for photosynthesis, allowing vegetables to develop properly.
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Carrots and potatoes are examples of vegetables that grow underground and develop from a 39……….. system.
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The 40……….. of certain vegetables, such as peppers and tomatoes, can vary depending on their ripeness and variety.
Answers:
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