2023山东省青岛市二模-政治答案

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2023山东省青岛市二模-政治答案试卷答案，以下是该试卷的部分内容或者是答案亦或者啥也没有

17.答案:D解析:萨顿将看不见的基因与看得见的染色体的行为进行类比,提出了基因位于染色体上的假说,A正确。摩尔根用果蝇作实验材料,做了大量实验,证明了基因位于染色体上,B正确。现代分子生物学技术能够用特定的分子,与染色体上的某一个基因结合,这个分子又能被带有荧光标记的物质识别,通过荧光显示,就可以知道基因在染色体上的位置,C正确。大肠杄菌是原核生物,没有染色体,D错误。

3.C【解析】∵QM∥PN,∴QM∥面ABD,因此QM∥BD,同理可得AC∥MN,QM∥BD,AC∥MNMN⊥QM,∴AC⊥BD,A正确;BD∥QM,∵BD∥截面PQMN,故B正确;∵QM∥BD,AC∥MN,MN⊥QMAC+BD=1,C不一定正确;:MN∥AC,异面直线PM与AC所成的角为∠PMQ=45°.故选C

第二节(满分25分)Paragraph 1:found the shoeboxthe attic.“ISusan said. Your mum was an amazing artist. The paper animals, hidden in the darkness of thethe paper animals was the paper tiger, which looked so shabby. I laughed, petting its bacon top ofattic for so long, had become fragile, and the bright wrapping paper patterns had faded. OParagraph 2I unfolded the paper tiger and found several lines of Chinese characters written by my motherIt reads, "My dear son, we havent talked for a long time. So i decided to write to you about whatwant to say in the paper tiger that you used to like so much. I love you so much, but can younderstand how I felt when you put the paper animals away and paid no attention to me? i feltwas losing everything. My heart ached, tears rolling down. Following the folding lines, I refoldedthe paper back into tiger and held it in my arm

8.参考答案D说明分析由题意,得a>0且a≠1当02023山东省青岛市二模-政治答案