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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 (when the h A. crush B. push C. brush D. rush 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 (when the h A. bring B. transfer C. produce D. pump 查看答案 我来回答: 提交 最新试题 ●    [单选题]违反消防管理法规,经消防监督机构通知采取改正措施而拒绝执行，造成严重后果的,对直接责任人员 ●    [判断题]玻璃容量仪器的校正只有衡量法。 ●    [判断题]电路图中的电容和电感相当于气路中的风缸 ●    [单选题]吊索与物件的夹角宜采用( ) ,且不得小于 30°,吊索与物件梭角之间应加垫块。 ●    [多选题]收缴()时,应当面以统一格式的专用袋加封,并在封口处加盖“假币”字样戳记。 ●    [多选题]紧固件有哪些表面处理方法（ ） 网站地图 我要搜题网  版权所有  ©2024  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： 截图扫码使用小程序[完全免费查看答案] 前往小程序 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