閱讀下面的短文，請根據(jù)短文后的要求答題（請注意問題后的詞數(shù)要求）。
[1]Global difference in intelligence is a sensitive topic, long filled with a large number of different opinions. But recent data has indeed shown cognitive (認知的) ability to be higher in some countries than in others. What's more, IQ scores have risen as nations develop—a phenomenon known as the "Flynn effect". Many causes have been put forward for both the intelligence difference and the Flynn effect, including education, income, and even non-agricultural labor. Now, a new study from researchers at the University of New Mexico offers another interesting theory: intelligence may be linked to infectious-disease rates.
　　[2]The brain, say author Christopher Eppig and his colleagues, is the "most costly organ in the human body". Brainpower consumes almost up to 90 percent of a newborn's energy. It's clear that if something affects energy intake while the brain is growing, the impact could be long and serious. And for vast parts of the globe, the biggest threat to a child's body—and therefore brain—is parasitic (由寄生蟲引起的) infection. These illnesses threaten brain development________________. They can directly attack live tissue, which the body must then try every means to replace. They can invade the digestive pipe and block nutritional intake. They can rob the body's cells for their own reproduction. And then there's the energy channeled (輸送) to the immune system to fight the infection.
　　[3]Using data on national "disease burdens" (life years lost due to infectious diseases) and average intelligence scores, the authors found they are closely associated. The countries with the lowest average IQ scores have the highest disease burdens without exception. On the contrary, nations with low disease burdens top the IQ list.
　　[4]If the study holds water, it could be revolutionary for our understanding of the still-confusing variation in national intelligence scores.
小題1:What is the main idea of the text？(no more than 10 words)
________________________________________________________________________
小題2:Complete the following statement with proper words.(no more than 4 words)
Those countries that have the ________________ are always at the bottom of the IQ list.
小題3:Fill in the blank in Paragraph 2 with proper words.(no more than 5 words)
___________                                                                
小題4:What can cause intelligence difference？(no more than 8 words)
______________________________________________________________________
小題5:What does the word “they” (Line2, paragraph3)probably refer to? (no more than 8 words)
______________________________________________________________________

小題1:Why do IQ scores vary by nation? / Why do IQ scores vary from nation to nation?/Different IQ between nations may result from infectious diseases.
小題2:highest disease burdens
小題3:in several ways 
小題4:Education, income and non-agricultural labor.
小題5:National disease burdens and average intelligence scores

小題1:根據(jù)第一段的But recent data has indeed shown cognitive (認知的) ability to be higher in some countries than in others可知
小題2:根據(jù)第三段的Using data on national "disease burdens"可知
小題3:in several ways
小題4:根據(jù)第一段的including education, income, and even non-agricultural labor可知
小題5:根據(jù)該段的Using data on national "disease burdens" (life years lost due to infectious diseases) and average intelligence scores可知
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第一節(jié)：閱讀表達（共5小題；每小題2分，滿分10分）
閱讀下面短文，并根據(jù)短文的要求答題（請注意問題后的字數(shù)要求）
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