问题 解答题

鱼类受精卵的孵化受水温影响很显著,下列表格和曲线图是某种鱼的受精卵在不同水温中孵化的实验结果:

水温(℃)1418222630343842
平均孵化率(%)0557092845660
请根据图,表数据分析回答:

(1)该种鱼的受精卵在水温为______℃时平均孵化率最高.

(2)在18℃~38℃温度范围内,平均孵化率与水温的关系是:在18℃~28℃之间,随水温上升,平均孵化率______;在26℃~38℃之间,随水温上升,平均孵化率______.

(3)若将14℃和两组鱼受精卵所处的水温分别逐步调节到26℃,结果14℃组的能孵化出鱼苗,而42℃组的不能孵化出鱼苗,原因是:42℃组的鱼受精卵______.

(4)水温在18℃~34℃之间时,鱼受精卵平均孵化时间与水温的关系是______.

答案

(1)由表中数据可知:该种鱼的受精卵在水温是26℃时,平均孵化率最高,达92%.

(2)表中数据告诉我们:水温低于14℃或高于42℃,受精卵不孵化;在18℃~28℃之间,随水温上升,平均孵化率上升;在26℃~38℃之间,随水温上升,平均孵化率下降.

(3)水温过高会导致鱼类受精卵死亡,因此若将14℃和42℃的两组鱼受精卵所处的水温分别逐步调节到26℃,结果14℃组的能孵化出鱼苗,而42℃组的不能孵化出鱼苗.

(4)通过曲线图可知:水温在18℃~34℃之间,鱼受精卵平均孵化时间是随着水温的升高,平均孵化时间逐渐减少.

故答案为:(1)26;

(2)上升;下降

(3)已经死亡

(4)随着水温的升高平均孵化时间减少

单项选择题
阅读理解

阅读下面的短文,并根据短文后的要求答题(请注意问题后的词数要求,并将答案写在二卷答题纸上)。

[1] What does a successful language learner do? Language learning research shows that successful language learners are similar in many ways.

[2] First of all, successful language learners are independent learners. They do not depend on the book or the teacher. Instead of waiting for teachers to explain, they try to find the patterns and the rules for themselves. They are good guessers who look for clues and form their own conclusions.

[3] Secondly, successful language learning is active learning. Therefore, successful learners do not wait for a chance to use the language but                . They find people who speak the language and they ask these people to correct them when they make a mistake. They will try anything to communicate. They are not afraid to repeat what they hear or to say strange things. They are willing to make mistakes and try again. When communication is difficult, they can accept information that is inexact or incomplete. It is more important for them to learn to think in the language than to know the meaning of every word.

[4] Finally, successful language learners are learners with a purpose. They want to learn the language because they are interested in the language.

[5] What kind of language learners are you? If you are a successful language learner, you have probably been learning independently, actively and purposefully. On the other hand, if your language learning has been less than successful, you might do well to try some of the techniques above.

小题1: What is the main idea of the text? (Please answer within 10 words.)

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小题2: Which sentence in the text can be replaced by the following one?

They make efforts to seek their own ways of learning rather than wait for explanations from their teachers.

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小题3: Please fill in the blank in Paragraph 3 with proper words or phrases to complete the sentence. (Please answer within 8 words)

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小题4: If you want to be a successful language learner, what should you do? (Please answer within 20 words)

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小题5: Translate the underlined sentence in Paragraph 3 into Chinese.

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