2021龙岩质检语文数学英语地理试题及参考答案

2021龙岩质检语文试题及参考答案

2021龙岩质检数学试题及参考答案

2021龙岩质检英语试题及参考答案

2021龙岩质检地理试题及参考答案

第二节(共10小题;每小题1.5分,满分15分)

阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Young sunflowers face the sun as it rises in the east and follow it across the sky until it sets in the west. Why does this happen? A team of scientists has finally been able to figure __61__ how and why young sunflowers move.

Older sunflowers always face east. However, as it __62__(turn) out, an internal(内部的)clock helps young sunflowers track the sun so that they can grow better. US biologist Stacey Harmer and her colleagues had it __63__ (explain) in a recent paper published in the journal Science on Aug. 5.

__64__ (depend) on the time of day, certain growth genes seem to work to different degrees on different __65__ (side) of young sunflowers’ stems(茎). The east side of their stems grows faster during __66__ day, causing the stems to __67__ (gradual) bend from east to west. The west side grows faster at night, preparing them for the next morning.

All this move is highly __68__ (benefit) to sunflowers. The team found that flowers kept away from the sun had leaves __69__ were 10 percent smaller on average. According to Harmer, sunflowers which __70__ (face) with the sun receive more bees and other insects because they like warm flowers.

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