2013同等学力申硕英语每日一练 11月19日

 　　Directions: In this part, there is a passage with ten blanks. For each blank there are four choices marked A,B,C and D. Choose the best answer for each blank and mark your answer on the ANSWER SHEET.

　　A . These nutrients can ( 1 )_______to the breeding of the organisms

　　B . more ( 2 )______ 2 , 600 square kilometers

　　C . ( 3)________ carry poisonous substances

　　The term " red tide” applies to the discoloration of water that sometimes occurs in certain areas of the ocean or sea . Although the color is often red , it may also be shades of brown or yellow . The World Book Encyclopedia reports that " the discolored areas may range from less than a few square yards to ( 4 )_______. "

　　What causes such discoloration? Red tides are generally caused by several species of single, celled organisms. These tiny organisms have hair-like projections which they use to propel themselves in water. There are about 2 , 000 varieties of these organisms , 30 of (5)_______. These minuteorganismsusually stay in warm waters with high content of salt .

　　A red tide occurs when there is a sudden and rapid bloom of these organisms. The concentration of these organisms may swell to 50, 000, 000 per quart of water! Although scientists do not fully understand why this happens, conditions simultaneously affect the water. These include abnormal weather, optimum temperatures, an oversupply of nutrients in the water, a generous amount of sunlight, and favorable water currents. When a heavy rainfall occurs, minerals and other nutrients are sometimes washed from the land into coastal water. (6) _ . The result? Red tides!

　　答案解析：

　　1. 【答案】contribute

　　【解析】 本题主要考查固定搭配。contribute to 为固定搭配，是“有助于，捐献”的意思，符合题意。所以，答案是contribute 。

　　2. 【答案】than

　　【解析】 本题主要考查固定搭配。more than 为固定用法，后面接数词，是“多于”的意思，符合题意。所以，答案是than 。

　　3. 【答案】which

　　【 解析】 本题考查定语从句的连接词。分析句子结构可知，此处为非限制性定语从句，所以应填关系代词which 。所以，答案是which 。

　　4. 【答案】B

　　【解析】空格所在句的意思为：《 世界书籍百科全书》 介绍说，“变色的区域可能在不少于几平方码到2 600 平方千米之间。”所以，B 项符合题意。所以，答案是B。

　　5. 【答案】C

　　【解析】空格所在句的意思为：大约有2 000 种这样的生物，其中的30 种携带有毒物质。这些微生物通常生活于含盐量高的温带水域。所以，C 项“携带有毒物质”符合题意。所以，答案是C 。

　　6. 【答案】 A

　　【 解析】 空格前一句的意思为：这些环境包括反常的天气，适宜的湿度，海水中营养物的过度供应，充足的阳光以及起促进作用的水流。当出现暴雨时，矿物质和其他营养物有时被从陆地冲向沿海水域。空格后一句的意思为：结果是什么呢?所以，A 项“这些营养物可能促进这些微生物的生长”符合题意。所以，答案是A 。