问题 解答题

下图分别为细胞结构和显微镜结构示意图,请据图回答:

(1)制作人口腔上皮细胞临时装片时,染色所用的液体是______.

(2)用显微镜观察制作好的临时装片,在镜下已经找到观察物,如果要使物像更清晰些,应调节显微镜的[______]______.

(3)在显微镜下观察到的人口腔上皮细胞的结构图应该是上图中的______(填A或B).

(4)细胞结构中,[______]______是细胞生命活动的控制中心.

答案

(1)染色:滴稀碘液染色.制作人口腔上皮细胞临时装片时,染色所用的液体是碘液.

(2)当看到物像的时候,改用细准焦螺旋进行调节,使物像更加清晰.用显微镜观察制作好的临时装片,在镜下已经找到观察物,如果要使物像更清晰些,应调节显微镜的[⑥]细准焦螺旋.

(3)植物细胞与动物细胞的区别:植物细胞具有细胞壁、叶绿体和液泡,动物细胞没有.在显微镜下观察到的人口腔上皮细胞的结构图应该是上图中的B.

(4)细胞的控制中心是细胞核.细胞核内有染色体,染色体中有DNA,DNA上有遗传信息.这些信息就是指导和控制细胞中物质和能量变化的一系列指令,也是生物体建造自己生命大厦的蓝图.细胞结构中,[4]细胞核是细胞生命活动的控制中心.

故答案为:(1)碘液;(2)⑥;细准焦螺旋;(3)B;(4)4;细胞核.

阅读理解

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AD2

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小题1:By dialing 414-479-9860, a fan of Michael Jackson can buy________ from the seller.

A.an iPod

B.a CD player

C.a Thriller album

D.a music skin featuring the star小题2:Which of the following descriptions of "Music skins–Vinyl protective covers" is true?

A.They are of the best quality.

B.They need to be changed constantly.

C.They have skins for all laptop models.

D.They don't have skins for classical musicians.小题3:How much do you have to pay for a "Michael09" T- shirt in red (size XL) and two music skins with images of Madonna?

A.$39.99

B.$83.97

C.$61.98

D.$101.79小题4:The best title of the 3rd advertisement would be ________.

A.Training at Home

B.Working at Home

C.Recording Work

D.Learning at Home

单项选择题