第14题: [填空题]According to scientists possible threat from nanomaterials may cause some severe problems. 参考答案:N 答案解析:由题干threat from nanomaterials可定位至第三段末句，该句提到科学家认为纳米材料的潜在威胁比起恐怖小说描述的场景要平常得多，但其严重程度开不亚于那些场景(no less seri
第32题: [单项选择]对于在代码中经常要用到的且不会改变的值，可以将其声明为常量。如圆周率PI始终为3.14。现在要声明一个名为PI的圆周率常量，下面哪段代码是正确的（）。 A. const float PI；PI=3.14f； B. const float PI=3.14f； C. float const PI；PI=3.14f； D. float const PI=3.14f； 参考答案:B
第35题: [单项选择]Because of high inflation, the economist predicted at a news conference yesterday that interest rates ______ by 1.5 percent during the next year A. has fluctuated B. has been fluctuated C. will fluctuate D. is being fluctuate 参考答案:C 答案解析:[理由] 本句句尾有表将来的时间副词词组during the next year(在未来这一年中)，故知空格内的动词应使用将来时。选项中仅(C)will fluctuate(将会震荡)是将来时，故应为
