单选题
Observe the dilemma of the fungus: it is a plant, but it possesses no chlorophyl. While all other plants put the sun's energy to work for them combining the nutrients of ground and air into body structure, the chlorophylless fungus must look elsewhere for an energy supply. It finds it in those other plants which, having received their energy free from the sun, relinquish it at some point in their cycle either to other animals (like us humans) or to fungi.
In this search for energy the fungus has become the earth's major source of rot and decay. Wherever you see mold forming on a piece of bread, or a pile of leaves turning to compost, or a blown-down tree becoming pulp on the ground, you are watching a fungus eating. Without fungus action the earth would be piled high with the dead plant life of past centuries. In fact, certain plants which contain resins that are toxic to fungi will last indefinitely. Specimens of the redwood, for instance, can still be found resting on the forest floor centuries after having been blown down.
单选题 The title below that best expresses the main idea of this passage is ______.
【正确答案】 D
【答案解析】奇异的真菌类植物。本文主要讲述真菌类植物与众不同的一些特征。
单选题 The statement "you are watching a fungus eating" is best described as ______.
【正确答案】 A
【答案解析】“you are watching a fungus eating”可以说成是比喻。B(ironical讽刺的)、 C(parenthetical作为附加语的)和D(joking开玩笑的)与这句话无关。
单选题 The author implies that fungi ______.
【正确答案】 B
【答案解析】作者暗示真菌类植物离开其他植物不能够完全存活。作者在第一段说,所有其他的植物让太阳的能量为它们服务,将泥土和空气中的营养成分化合,进入植物的体内,没有叶绿素的真菌类植物必须到别的地方寻求能量的供应。真菌类植物在其他的植物那里找到能量。
单选题 The author uses the word "dilemma" to indicate that ______.
【正确答案】 D
【答案解析】作者用dilemma(困境)这个词表明真菌类植物似乎有其自身的生物学规律。本文第一段说,观察一下真菌类植物的困境,它是植物,却没有叶绿素,它要到其他的植物那儿获取能量,这实质上是真菌类植物自身的生物学规律。
单选题 Which word best describes the fungus as depicted in the passage?
【正确答案】 D
【答案解析】parasitic意为“寄生的”,它最适合描述真菌类植物的特征。