问题 选择题

下列关于汗腺的表述,错误的是

A.汗腺分布于皮肤、腋窝、掌心和足底等处

B.汗腺分为分泌部和导管

C.汗腺可代谢出部分尿素

D.汗腺是内分泌腺

答案

答案:D

题目分析:皮肤的主要功能有保护、分泌、排泄、调节体温和感受外界刺激等作用,汗腺和血管能够调节体温,当气温高时,汗腺分泌和排出的汗液增多,流经体表的血液增多,就能散失体内的热量,当气温低时,汗腺分泌的汗液减少,流经体表的血液减少,就能减少体内热量的散失,保持体内的热量,皮肤具有调节体温的功能,这是由于真皮内含有丰富的血管和汗腺,所以皮肤内能调节体温的主要结构是血管和汗腺,表皮内没有血管,皮脂腺有分泌皮脂的作用,有些腺体如汗腺、唾液腺、肝脏等,它们的分泌物可以通过导管排出去,这类腺体叫做外分泌腺,可见D说法错误。

完形填空
A boy was walking home from school when he saw a large, tempting(诱人的)apple on one of the branches of an apple tree hanging out over a tall fence. The boy wasn’t much of a fruit-eater,  26 a bar of chocolate if given the choice,  27  , as they say, the forbidden fruit can be tempting. Seeing the apple, the boy wanted it. The more he looked at it, the 28 he felt and the more he wanted that apple.
He stood on tiptoe(脚尖),29 as high as he could, but even as his tallest 30 he was unable to touch it. He began to  31 up and down, as high as he could, at the  32 of each jump stretching his arms to get the apple. Still it remained out of  33 .
Not giving up, he thought, if only he had something to  34 on. His school bag wouldn’t give enough height and he didn’t want to  35 the things inside, like his lunch box, pencil case, and Gameboy. Looking   36 , he hoped he might find an old box, a rock , or,  37 luck, even a ladder, but it was a tidy neighborhood and there was nothing he could use.
He had tried everything he could think to do,   38  seeing any other choices, he gave up and started to walk   39 . At first he felt angry and disappointed thinking about how hungry he had become from his  40 , and how he really wanted that apple. The more he 41  like this, the more unhappy he became.
42 , the boy of our story was a pretty smart guy, even if he couldn’t always get what  he wanted. He started to say to himself, “ This isn’t  43 , I don’t have the apple and I’m feeling miserable as well. There’s  44 more I can do to get the apple—hat is unchangeable—but we are supposed to be able to  45 our feelings. If that’s the case, what can I do to feel better?
小题1:
A.preferringB.offering C.receivingD.allowing
小题2:
A.soB.thenC.butD.or
小题3:
A.sadderB.angrierC.hungrier D.tastier
小题4:
A.expandingB.stretchingC.swingingD.pulling
小题5:
A.strength B.lengthC.range D.height
小题6:
A.jump B.look C.walk D.glance
小题7:
A.tip B.stageC.topD.level
小题8:
A.hope B.hand C.sightD.reach
小题9:
A.put B.stand C.get D.hold
小题10:
A.breakB.shakeC.take D.strike
小题11:
A.upB.forward C.down D.around
小题12:
A.forB.with C.on D.of
小题13:
A.After B.ThroughC.Without D.Upon
小题14:
A.backB.awayC.upD.down
小题15:
A.wishesB.beliefsC.effortsD.goals
小题16:
A.thoughtB.imagined C.triedD.claimed
小题17:
A.ThereforeB.HoweverC.MoreoverD.Otherwise
小题18:
A.skillfulB.cheerfulC.harmful D.helpful
小题19:
A.somethingB.anythingC.everything D.nothing
小题20:
A.change B.express C.forget D.describe
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