第二部分：閱讀理解(共20小題;每小題2分，滿分40分)

　　閱讀下列短文，從每題所給的四個選項(xiàng)(A、B、C和D)中，選出最佳選項(xiàng)。

　　A

　　If you travel to a new exhibit at the San Francisco Conservatory of Flowers，you will have chances to see some meat­eating plants.Take bladderworts，a kind of such plant，for example.They appear so small and grow in a quiet pond.But these are the fastest­known killers of the plant kingdom，able to capture a small insect in 1/50 of a second using a trap door!

　　Once the trap door closes on the victim，the enzymes(酶)similar to those in the human stomach slowly digest the insect.When dinner is over，the plant opens the trap door and is ready to trap again.

　　Meat­eating plants grow mostly in wet areas with soil that doesn't offer much food value.In such conditions，these amazing plants have developed insect traps to get their nutritional needs over thousands of years.North America has more such plants than any other continent.

　　Generally speaking，the traps may have attractive appearance to fool the eye, like pitcher plants，which get their name because they look like beautiful pitchers (a container like a bottle) full of nectar(花蜜).

　　The Asian pitcher plant，for example，has bright colors and an attractive half­closed lid.Curious insects are tempted to come close and take a sip，and then slide down the slippery(光滑的)slope to their deaths.

　　Hair­like growths along the pitcher walls ensure that nothing can escape，and the digestive enzymes can get to work.A tiny insect can be digested in a few hours，but a fly takes a couple of days.

　　Some of these pitchers are large enough to hold two gallons.Meat­eating plants only eat people in science fiction movies，but sometimes a bird or other small animals will discover that a pitcher plant isn't a good place to get a drink.

　　【語篇解讀】 本文是一篇說明文，介紹了一些特別的植物——靠捕食動物獲得生長所需養(yǎng)分的“食肉植物”。

　　36.From the first paragraph，we can know that bladderworts can________.

　　A.capture 50 small insects in a second

　　B.capture an insect in the shortest time

　　C.be found floating on a quiet lake

　　D.digest an insect in 1/50 of a second

　　解析　細(xì)節(jié)理解題。第一段指出，bladderworts能在1/50秒的時間內(nèi)捕獲一只小昆蟲，是植物中已知的捕獲動物速度最快的，因此選B。

　　答案　B

　　37.If the trap door of a meat­eating plant is closed，the plant________.

　　A.is fooling insects into taking a sip

　　B.is producing nectar

　　C.is tempting insects to come close

　　D.is enjoying a dinner

　　解析　細(xì)節(jié)理解題。第二段說，一旦“陷阱門”將獵物關(guān)起來，類似于人胃里的那些消化酶就開始慢慢地消化它了，由此判斷D正確。

　　答案　D

　　38.Meat­eating plants can grow in wet and poor soil because they________.

　　A.can get nutrition from animals

　　B.don't need much food value

　　C.can make the most of such conditions

　　D.have developed digestive enzymes

　　解析　推理判斷題。這些植物生長在潮濕貧瘠的土壤中，為獲得生長所需的養(yǎng)分，在數(shù)千年的進(jìn)化中，它們演化出了捕獲昆蟲的“陷阱”，由此推出它們主要從動物中獲取養(yǎng)分，而不是從土壤中獲取養(yǎng)分。

　　答案　A

　　39.Which of the following is the picture of the Asian pitcher plant?

　　解析　推理判斷題。根據(jù)第四、五、六段可知亞洲捕蟲草主要有這些特征：狀如水瓶，顏色鮮亮，有半掩的蓋子，綜合此三項(xiàng)可知，只有A項(xiàng)最合適。

　　答案　A