Which of the following underlined parts is different in pronunciation from the others?
A.What's the meaning of this word? B.Her boyfriend's death made her very sad.
C.You can take this seat because there is no one else here. D.My dream job is to be an astronaut.
科目:初中英语 来源:上海市浦东新区进才北校2019-2020学年九年级上学期第一次月考英语试卷 题型:单选题
--- Would you mind my using your printer for a while? -- _______
A.Never mind B.Take it easy C.Certainly not D.You’re welcome
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科目:初中英语 来源:牛津上海版英语九年级第一学期 Unit 6 单元测试卷 题型:单选题
Please finish off ________ of the bread on the plate. Don't waste it.
A.the other B.another C.the rest D.else
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科目:初中英语 来源:上海市2019-2020学年九年级上学期期中英语试卷 题型:单选题
Some people have no choice but their dogs in small spaces.
A.keep B.keeping C.to keep D.kept
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科目:初中英语 来源:上海市2019-2020学年九年级上学期期中英语试卷 题型:单选题
Although Sally tried her best, she didn't manage the record.
A.break B.breaking C.to breaking D.to break
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科目:初中英语 来源:北京广渠门中学2019-2020学年九年级上学期期中英语试卷 题型:阅读单选
Young sunflowers turn and swing every day. New findings add to evidence that the plants are animal-like.
Harmer, a professor in the University of California at Davis, Department of Plant Biology, carried out a series of experiments on sunflowers in the field, in pots outdoors and in indoor growth chambers.
By staking plants so that they could not move, Harmer showed that he could destroy their ability to track the sun. He also noticed that sunflowers prevented from moving were not as tough and leafy as those that were free to move. When plants were moved indoor with a settled overhead light, they continued to swing back and forth for a few days.
The indoor plants did start tracking the “sun” again when the apparent source of lighting was moved across the room. The plants could reliably tack the movement and return at night when the artificial day was close to a 24-hour cycle, but not when it was closer to 30 hours.
When sunflowers track the sun, the east sides of their stems grew more rapidly than the west sides. At night, the west sides grew faster as the stem swung the other way. The team identified a number of genes that were expressed at higher levels on the sunward side of the plant during the day or on the other side at night. A plant growth-regulating hormone (激素), called auxin, appears to be a key driver.
The “dance” to the sun cycle obviously slows when the sunflower matures (成熟) and its flowers open up. At that point, the plants stop moving during the day and settle down facing the sun in the east.
“Bees like warm flowers.” Harmer said, adding that the bees are cold-blooded, so landing on a warm flower saves them energy and perhaps feels really good.
“The morning warmth changes the flowers in a way to make them more appealing to insects, perhaps causing them to release more attractive scents earlier in the day.” he said “We’re currently testing this idea.”
1.Why did Harmer do the experiment on sunflowers?
A.To see how sunflowers grow up B.To show what sunflowers’ genes are.
C.To study why sunflowers track the sun. D.To check if sunflowers swing in cloudy days.
2.What does the underlined word “staking” probably mean in Paragraph 3?
A.breaking B.controlling C.growing D.searching
3.What is the result of sunflowers being stopped from moving?
A.They will produce a number of new genes. B.They will grow faster than usual.
C.They won’t swing back though set free. D.They won’t grow well.
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科目:初中英语 来源:北京广渠门中学2019-2020学年九年级上学期期中英语试卷 题型:单选题
—Hello. May I speak to Mary?
—Sorry. She to museum just now.
A.go B.went C.goes D.will go
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科目:初中英语 来源:北京理工大学附属中学分校2019-2020学年七年级上学期第一次月考英语试卷 题型:单选题
— Let’s play computer games. —That _______ fun.
A.is sound B.sound C.sounds D.is sounds
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科目:初中英语 来源:牛津上海版英语九年级第一学期期末基础测试卷 题型:单选题
Mother put blanket over the sleeping baby to keep him __________.
A.warm B.quietly C.gentle D.slowly
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