题目

用显微镜观察玻片标本时，把低倍物镜换成高倍物镜后，视野内（ ） A．视野变亮，细胞数目增多   B．视野变亮，细胞数目减少 C．视野变暗，细胞数目增多   D．视野变暗，细胞数目减少 答案：D动词运用。用括号内所给动词的适当形式填空。    Today a quarter of the world’s population use English, and as many as one billion people _1_（learn）it.    New types of English _2_（be） common wherever English is spoken. Singaporeans speak “ Singlish”. For example, to ask, “Where are you going?”, they mix English words with Chinese grammar: You go where?    When you _3_（go） to Egypt, people always say, “Welcome in Egypt.” Why do they say this? It’s an example of how English changes over time and from place to place. Using “ in” after “ welcome” _4_（be） normal in Egypt.    Languages _5_ always ___（change）. A hundred years ago, German _6_（be） the most popular language for science. Scientists _7_（have） to learn German to read the latest information in science books. But by 1950, American inventions and ideas _8_（help） to make English more popular. Some language teachers believe that if China _9_（begin） to develop important technologies, such as new types of computers, then Chinese might become the language that every scientist wants to learn. Already, many business people _10_（learn） Chinese to help them do business in China.