下列标识符哪些是不合法的（）。A、+staticB、J_catC、-3.14159avaD、5books

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高等继续教育 / Java程序设计

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下列标识符哪些是不合法的（）。
A、+static
B、J_cat
C、-3.14159ava
D、5books

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Java程序设计

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高等数学三：线性代数

当内部收益率等于贴现率时，则下列说法正确的是：(A) 效益成本率>1，净现值>0 (B) 效益成本率>1，净现值交通运输经济

题型描述: 阅读理解In the United States, 30 percent of the adult population has a “weight problem”. To many people, the cause is obvious: they eat too much. But scientific evidence does little to support this idea. Going back to the America of the 1910s, we find that people were thinner than today, yet they ate more food. In those days people worked harder physically, walked more, used machines much less and didn’t watch television. Several modern studies, moreover, have shown that fatter people do not eat more on the average than thinner people. In fact, some investigations, such as the 1979 study of 3,545 London office workers, report that, on balance, fat people eat less than slimmer people. Studies show that slim people are more active than fat people. A study by a research group at Stanford University School of Medicine found the following interesting facts: The more the men ran, the more body fat they lost. The more they ran, the greater amount of food they ate. Thus, those who ran the most ate the most, yet lost the greatest amount of body fat. (183 words)1、 In comparison with the adult American population today, the Americans of the 1910s _ _ _ _ _ _ _ . A. ate less food and had less physical exercise B. ate less food but had more activities C. ate more food and had more physical activities D. had more weight problems 2、 Is there any scientific evidence to support that eating too much is the cause of a “weight problem?” A. Yes, there is plenty of evidence. B. Of course, there is some evidence to show this is true. C. There is hardly any scientific evidence to support this. D. We don’t know because the information is not given. 3、 According to the article, given 500 adult Americans, _ _ _ _ _ _ _ people will have a “weight problem.” A. 150 B. 50 C. 30 D. 100 4、 The physical problem that many adult Americans have is that _ _ _ _ _ _ _ _ . A. they are too fat B. they lose too much body fat C. they are too slim D. they work too hard 5、 Modern scientific researches have reported to us that _ _ _ _ _ _ _ _ . A. fat people eat more food than slim people but are less active B. fat people eat less food and are less active C. fat people eat more food than slim people and are more active D. thin people run less, but have greater increase in food intake统考英语A

(单选题) Why did his wife want a telegram from him?( ) A、Because she didn't know his address yetB、Because she wanted to go to New York, tooC、Because she might send him another telegramD、Because she couldn't leave her husband by himself in New York大学英语

document.write($wapper.api.getDisplayFormat("(A)x=1是驻点(B)x=1是极值点(C)x=1是拐点(D)点(1，2)是拐点[参考答案：D] 分值：4"));(A)x=1是驻点(B)x=1是极值点(C)x=1是拐点(D)点(1，2)是拐点[参考答案：D] 分值：4showAnswer("lemonysoft_item_svvywjirvn_25","","3");得分：分系统自动批改于2020年8月25日 1点03分 (A)x=1是驻点(B)x=1是极值点(C)x=1是拐点(D)点(1，2)是拐点[参考答案：D] 分值：4高等数学2

设a、b为字符型变量，执行“scanf(“a=%c,b=%c”,&a,&b);”后使a为’A’，b为’B’，从键盘上的正确输入是（）(A) ‘A’’B’ (B) ‘A’,’B’ (C) A=A,B=B (D) a=A,b=BC++程序设计