| An adult giraffe’s head is about six
feet above its heart. This means that to{{U}} (67) {{/U}}enough blood up
to the brain the circulatory{{U}} (68) {{/U}}must be strong enough to
keep the blood at very high pressure. Biologists have known for some time that giraffes solve this problem by having{{U}} (69) {{/U}}high blood pressure, about{{U}} (70) {{/U}}that of human beings. But an international team of biologists began to{{U}} (71) {{/U}}about this. If giraffes have such high blood pressure, they should have a{{U}} (72) {{/U}}problem with swelling in their legs and feet. Why don’t giraffes have swollen feet Giraffes should have{{U}} (73) {{/U}}problem, too. Every time they bend heads{{U}} (74) {{/U}}to drink, the blood should{{U}} (75) {{/U}}to their heads and have a hard time{{U}} (76) {{/U}}back up (when the h A. bring B. transfer C. produce D. pump [判断题] 各单位可参照附录N和现场情况划分一级和二级动火区,制定需要执行一级和二级动火工作票的工作项目一览表,并经本单位批准后执行。( ) (1.0分)
A.正确 B.错误 [单项选择]男，76岁，高血压30余年，平时血压在150～180/90～110mmHg，不规则服用降压药。 2周来胸闷、气促，贫血貌，颈静脉怒张，心界向左下扩大，心率104次/分，两肺底有细小湿啰音，肝肋下二指，下肢水肿中度，尿蛋白+，血肌酐884μmol/L(10mg/dl)。
肾衰竭最可能的病因是 A. 慢性肾小球肾炎致肾性高血压 B. 肾小动脉硬化 C. 慢性肾盂肾炎 D. 心力衰竭致肾功能减退 [多选题]十九大报告指出,巩固和发展爱国统一战线。坚持( ),支持民主党派按照中国特色社会主义参政党要求更好履行职能。( )
A.长期共存 B.互相监督 C.肝胆相照 D.荣辱与共 [多项选择]持票人行使追索权，应具备哪两个基本条件（）。
A. 票据承兑 B. 票据保证 C. 在规定期限提示付款 D. 获得拒绝证明或退票理由书 [多选题]在2007年开始的美国次贷危机下，全球证券市场的发展呈现出一些新趋势，表现为（ ）。
A.金融机构的去杠杆化 B.金融监管的改革 C.国际金融合作的进一步加强 D.金融风险复杂化 [单项选择]制定成功的营销策略和避免严重的营销失误的关键因素是（）
A. 正确的决策 B. 市场调研 C. 信息 D. 市场定位 我来回答: 提交
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