【题目】 You won’t find paper cutting difficult __________ you keep practicing it.
A.even if
B.as long as
C.as if
D.ever since
科目:高中地理 来源: 题型:
【题目】(2014·江西) Anyway, we’re here now, so let’s _________ some serious work.
A. come up with B. get down to
C. do away with D. live up to
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科目:高中地理 来源: 题型:
【题目】如图是某同学在“目镜10×,物镜40×”时显微镜下看到的图像,据图回答下列有关问题:
(1)下列选项是有关显微镜的使用步骤,其中句前是操作,句后是目的,错误的是( )
A.转动转换器:换用不同放大倍数的物镜
B.调节细准焦螺旋:调节物镜与玻片标本之间的距离
C.调节光圈:调节视野的大小
D.调节反光镜:调节视野的亮度
(2)欲将图中③所指的细胞移到视野的中央进行观察,则装片应向________方移动。
(3)若装片上的细胞成单层均匀分布,那么该同学在目镜不变的情况下,换用10×的物镜去观察相同部位的细胞,按理论计算,视野内可容纳的完整细胞数目为_______个。
(4)在一架光学显微镜的镜盒里有4个镜头,甲、乙一端有螺纹,甲较长、乙较短;丙、丁无螺纹,丙较长、丁较短。则放大倍数最大的镜头组合是________。
(5)观察玻片标本时,若发现视野左侧较暗,右侧较亮,则应调节________。
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科目:高中地理 来源: 题型:
【题目】 The film was so moving that we all burst into tears. Never before seen a film like that.
A. had I B. I had
C. have I D. I have
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科目:高中地理 来源: 题型:
【题目】It was a new (idea) to Jason. He thought of his bird with no (seeds) and the cake he wanted to buy for his mother, but was that he would not tell a lie.
A. concerned
B. amazed
C. excited
D. determined
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【题目】下图为典型的细胞核及其周围部分结构示意图,请据图回答下列问题(在[ ]中填标号,在 上填相应的名称)。
(1)只有在 细胞中,使用 显微镜才能观察到该图表示的结构。
(2)[3] 主要由 组成。
(3)结构4是 ,其功能是 。
(4)图中所示的结构是否来自细菌? ,简述理由: 。
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科目:高中地理 来源: 题型:
【题目】 Why don't you bring______to his attention that you're too ill to work on?
A. that
B. it
C. this
D. him
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科目:高中地理 来源: 题型:
【题目】Whenever he was asked why he was late for class, he would answer carelessly, always __________ the same thing.
A. saying B. said C. to say D. having said
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