Leaves are not distributed <u>accidentally</u> on a plant stem, but are arranged in a very precise way that assures them the maximum light.

试卷相关题目

• 1At first glance, a forest appears to be a <u>haphazard</u> collection of trees, shrubs, vines, and flowers.

  A.random

  B.total

  C.graded

  D.natural

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• 2Medieval cities grew rapidly when they had <u>harbors</u> nearby.

  A.merchants

  B.castles

  C.suburbs

  D.ports

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• 3Because of <u>harsh</u> weather conditions, more than a dozen states in the United States were declared disaster areas in 1977.

  A.severe

  B.bizarre

  C.moist

  D.improbable

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• 4The best olive oil is obtained from olives that are <u>harvested</u> just after they ripen and before they turn black.

  A.preserved

  B.squeezed

  C.gathered

  D.sorted

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• 5Modern nursing practices not only <u>hasten</u> the recovery of the sick but also promote better health through preventive medicine.

  A.permit

  B.determine

  C.accelerate

  D.accompany

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• 6In the eighteenth century the <u>heading</u> of “natural philosophy” encompassed all of the sciences.

  A.category

  B.teachings

  C.ideology

  D.leaders

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