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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 (w A. up B. down C. toward D. aside 查看答案 更多"An adult giraffe’s head is about si"的相关试题: [单项选择] 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 (w A. bring B. produce C. transfer D. pump 查看答案 我来回答: 提交 最新试题 ●    胎儿附属物包括（） ●    [单选题]根据《山东省农村商业银行员工违规行为处理办法》，违规发行和销售“三无”理财产品，不具备发行 ●    [单选题]判定一笔业务是否是绿色金融业务，主要看（ ）是否符合本行的绿色金融属性认定标准 ●    [判断题]()起重指挥人员有认定起重机三大安全关键部件是否存在缺陷和隐患的职责。 ●    患者，男，48岁。食积不化，脘腹胀痛，纳食不香。诊断为胃下垂，首选药物是（） ●    [简答题]“三违”指的是什么？ 网站地图 我要搜题网  版权所有  ©2023  湘ICP备18016427号   购买搜题卡查看答案 [会员特权] 开通VIP， 查看 全部题目答案 [会员特权] 享免全部广告特权 推荐91天 ¥36.8 ￥80元 31天 ¥20.8 ￥40元 365天 ¥88.8 ￥188元 请选择支付方式 微信支付 支付宝支付 点击支付即表示同意并接受了《购买须知》 立即支付 系统将自动为您注册账号 已有账号登录 找回账号密码 请使用微信扫码支付 订单号： 请不要关闭本页面，支付完成后请点击【支付完成】按钮 支付完成 取消支付 恭喜您，购买搜题卡成功 系统为您生成的账号密码如下： 账号 密码 重要提示：请拍照或截图保存账号密码！ 我要搜题网官网：https://www.woyaosouti.com 我已记住账号密码