举一反三
- Maple trees are thought to be fall color trees or foliage trees.
- 262.30 % of the young trees, attacked by diseases, ________pine trees. A: is B: are C: was D: has been
- People who love trees may （）. A: never cause trees injury B: damage trees on purpose C: do harm to trees without knowing it D: not be aware of which trees are healthy
- 中国大学MOOC: ________more attention, the trees could have grown better.
- People who love trees may ______. A: never cause trees injury B: damage trees on purple C: do some harm to trees without knowing it D: not be aware of which trees are healthy
内容
- 0
中国大学MOOC: There are ____________ trees on the hill.
- 1
Two types of pine trees share a common habitat in eastern Texas. Although both types of pine trees produce pollen at the same time, the pollen grains from one type of pine tree are not able to pollinate the ovules of the other type of pine trees. Which of the terms describes the relationship between the two types of pine trees? I. prezygotic isolationII. postzygotic isolationIII.habitat isolationIV. sympatric species A: I only B: I and IV C: II only D: II and III
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The age of other trees is variously estimated as () from two hundred to eight hundred years. A: changing B: differing C: varying D: ranging
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The purpose of the passage is to tell ______. A: that people should protect trees B: that people should plant more trees C: what trees can be used for D: what kinds of trees look beautiful
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Listen to a passage and choose the best answer from the four choices provided for each question. A: Climbing trees to cut some branches for people. B: Planting trees near their village in central China. C: Helping other people to learn how to plant trees. D: Seeking opportunities to protect the environment.