下列关于成像问题的说法不正确的是( ) A.利用针孔照相机能得到倒立的像 B.站

题型:选择题

问题:

下列关于成像问题的说法不正确的是(  )

A.利用针孔照相机能得到倒立的像

B.站在岸边我们看到的水里的物体,其实它们的虚像

C.平面镜能使房间看起来更宽敞,是因为像比物体离镜子更远

D.有时摄影师让我们走得离他近些,是想让底片中的像更大

考点:光的直线传播的应用平面镜成像的特点和原因光的折射现象凸透镜对光的作用
题型:选择题

阅读下文并回答问题。

Mr. King is from America. He and his wife are teachers. They teach English in a middle school in Beijing. They have two daughters. They are twins. Their names are Lucy and Lily. They're twelve. They look the same. They are students, but they are in different school. Their family has two bikes and a car. One bike is for Lily, the other is for Lucy. Mr. and Mrs. King go to work in their car. They have many friends in China. They sometimes go to the friends' home for supper(晚餐).

小题1:Where is Mr. King from?

                                         

小题2: How do Mr. and Mrs. King go to work?

                                         

小题3: Do Mr. and Mrs. King have many friends in China?

                                         

题型:选择题

《中国药学文摘》和《国际药学文摘》属于( )。

A.一次文献
B.二次文献
C.百科类
D.药品集
E.工具书

题型:选择题

重大事故隐患评估费用由()支付。

A.被评估单位

B.评估单位

C.当地政府财政

D.国家财政

题型:选择题

对文献标引和检索查询具有主要作用的是()。

A.标题

B.关键词

C.前言

D.摘要

题型:选择题

为了验证“植物主茎顶芽产生的生长素能够抑制侧芽生长”,某同学进行了以下实验:①选取健壮、生长状态一致的幼小植株,分为甲、乙、丙、丁4组,甲组植株不做任何处理,其他三组植株均切除顶芽。然后乙组植株切口不做处理,丙组植株切口处放置不含生长素的琼脂块;丁组植株切口处放置含有适宜浓度生长素的琼脂块。②将上述4组植株置于相同的适宜条件下培养。回答下列问题:

比较乙组与丙组的预期结果,能够说明()

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