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【单选题】
关于肾上腺髓质激素作用叙述,错误的是
A.
心输出量增加
B.
血压升高
C.
血流量减少
D.
代谢增强
E.
支气管平滑肌舒张
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【简答题】下表是X、Y两国人口数据表,分析并完成3--4题。 人口密度(人/km 2 ) 出生率(%) 死亡率(%) X国 108 4.2 1.8 Y国 275 0.6 0.7 小题1:具有X国人口状况特征的国家最多分布于 A 欧洲             B 大洋洲           C 非洲             D 北美洲 小题2:Y国可能位于 A 欧洲             B 大洋洲    ...
【单选题】Angelina Jolie finally chose acting because she thought______.
A.
her father could see her on the screen
B.
acting was interesting and attractive to her
C.
she could hardly communicate with her father
D.
her father could understand her better through films
【简答题】When many people from other countries come to America for the first time, they meet man y difficulties. They can't speak much English, and they don't know much 1 America. Sometimes, they make mistakes...
【单选题】关于青少年过早性行为的特点及危害性,下列叙述不正确的是( )。
A.
无计划性和无保护性,一次导致非意愿妊娠,性交过早、频繁、不洁性交和多性伴侣
B.
绝大多数的少女妊娠的结局是人工流产终止妊娠,人工流产会产生不良后果的并发症如子宫感染、子宫粘连、不孕异位妊娠等
C.
影响心理健康,由于社会的压力和手术的恐惧会导致紧张、苦恼甚至焦虑、抑郁从而引起闭经、不孕、性生活心理障碍等病症
D.
少女过早开始性生活、早婚、早育和有多性伴侣等还是子宫颈癌的高危因素
E.
易患子宫内膜癌
【单选题】仅承认东道国的征税权,投资国放弃征税权的是哪种税收优惠政策
A.
税收减免
B.
税收饶让
C.
延期纳税
D.
免税
【单选题】青少年健康行为的致病特点是( )
A.
潜伏期长
B.
特异性差
C.
联合作用
D.
广泛存在
E.
以上都是
【简答题】1.Jane can’t attend the meeting at 3 o’clock this afternoon because she____________(teach) a class at that time. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace> 2. The report w...
【简答题】The teacher thought hobbies were very important for every child. She 36 all her pupils to have one, and sometimes 37 for their parents to come and see the work they had done as a result. One Friday 38...
【简答题】用户如何利用CNKI查找某一领域的重要文献
【单选题】假设投入等量的劳动,甲、乙两国分别生产产品X和产品Y的数量如下表所示。如果甲乙两国开展贸易,并且交换比例是1单位X换2.5单位Y,也就是按照甲国国内的交换比例进行交换。请问下列说法哪个正确?
A.
甲国获利0单位Y,乙国获利1.5单位Y
B.
甲国获利0.5单位Y,乙国获利1单位Y
C.
甲国获利0.5单位Y,乙国没有获利0单位Y
D.
甲国、乙国都没有获利
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