问题
单项选择题
地方性氟病的预防主要是
A．改水
B．饮水加除氟剂
C．种植吸氟植物
D．食物除氟
E．治疗氟斑牙
答案
参考答案：A
解析：预防地方性氟病的措施有多种。在本题的5个措施中，主要的是改水。改饮含氟量正常的水，这是从根本上消除了氟的来源。
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地方性氟病的预防主要是
A．改水
B．饮水加除氟剂
C．种植吸氟植物
D．食物除氟
E．治疗氟斑牙
参考答案：A
解析：预防地方性氟病的措施有多种。在本题的5个措施中，主要的是改水。改饮含氟量正常的水，这是从根本上消除了氟的来源。
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| What is intelligence (智力) anyway? When I was in the army I 1 an intelligence test that all soldiers took, and, against 2 of 100, I scored 160. I had an auto-repair man once, who, on these intelligence tests, could not 3 have scored more than 80. 4 , when anything went wrong with my car I hurried to him-and he always 5 it. Well, then, suppose my auto-repair man 6 questions for some intelligence tests. By every one of them I'd prove myself a 7 . In a world where I have to work with my 8 , I'd do poorly. Consider my auto-repair man 9 . He had a habit of telling 10 .One time he said, "Doc, a deaf-and-dumb (聋哑) man 11 some nails. Having entered a store, he put two fingers together on the counter and made 12 movements with the other hand. The clerk brought him a hammer. He 13 his head and pointed to the two fingers he was hammering. The clerk 14 him some nails. He picked out the right size and left. Well, Doc, the 15 man who came in was blind. He wanted scissors (剪刀). 16 do you suppose he asked for them?" I lifted my right hand and made scissoring movements with my first two fingers. He burst out laughing and said, "Why, you fool,he used his 17 and asked for them. I've been 18 that on all my customers today,but I knew 19 I'd catch you." "Why is that?" I asked. "Because you are so goddamned educated. Doc. I knew you couldn't be very 20 ". And I have an uneasy feeling he had something there. | |||
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