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问题 单项选择题 A1/A2型题

遗传的物质基础是（）

A.基因

B.线粒体

C.染色体

D.生殖细胞

E.脱氧核糖核酸

答案

参考答案：A

解析：基因是遗传的物质基础，是带有遗传信息的DNA分子片段，在染色体上有特定的位点。

单项选择题 案例分析题

男患，50岁，突发头痛、呕吐伴发热、精神行为异常5天。查体：体温38.5℃，神志清，四肢肌力、肌张力正常，双Babinski征（-），颈抵抗（+），Kerig征及Brudzinski征均阴性。脑电图：广泛中度异常；头颅CT：未见异常

若腰穿检查：脑脊液压力200mmH2O，脑脊液无色清亮，糖3mmol/L、氯化物125mmol/L，蛋白0.92g/L，白细胞200×106/L，淋巴细胞82%，单核细胞18%。则最可能诊断为（）

A.脑脓肿

B.化脓性脑膜炎

C.隐球菌脑膜炎

D.结核性脑膜炎

E.病毒性脑炎
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单项选择题

The high cost of production is severely limiting which operas are available to the public. These costs necessitate reliance on large corporate sponsors, who in return demand that only the most famous operas be produced. Determining which operas will be produced should rest only with ticket purchasers at the box office, not with large corporate sponsors. If we reduce production budgets so that operas can be supported exclusively by box-office receipts and donations from individuals, then the public will be able to see less famous operas.
Which one of the following, if true, would weaken the argument

A．A few opera ticket purchasers go to the opera for the sake of going to the opera, not to see specific operatic productions.

B．The reduction of opera production budgets would not reduce the desire of large corporate sponsors to support operas.

C．Without the support of large corporate sponsors, opera companies could not afford to produce any but the most famous of operas.

D．Large corporate sponsors will stop supporting opera productions if they are denied control over which operas will be produced.

E．(E) The combination of individual donations and box-office receipts cannot match the amounts of money obtained through sponsorship by large corporations.
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