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Someday, in {{U}} 62 {{/U}} the outer planets of our solar system, humankind will want to do {{U}} 63 {{/U}} send small probes that merely fly rapidly by them. In time, we will want {{U}} 64 {{/U}} spacecraft that will go {{U}} 65 {{/U}} orbit around these alien planets, land robots on their moons, and even return rock and soil sample back to Earth. {{U}} 66 {{/U}}, we will want to send humans to their moons, on at least {{U}} 67 {{/U}} which liquid water—the fundamental requirementfor life {{U}} 68 {{/U}} we know it—is believed to be {{U}} 69 {{/U}}. For missions such as these, we will need rockets powered by a nuclear reaction {{U}} 70 {{/U}}igniting chemicals. Chemical rockets have served us well. But the {{U}} 71 {{/U}} low amount of energy that they can deliver for a given mass of fuel is a severe {{U}} 72 {{/U}} when dispat A. other than B. regardless of C. instead of D. rather than 查看答案 更多"Someday, in {{U}} 62 {{/U}} the "的相关试题: [单项选择] Someday, in {{U}} 62 {{/U}} the outer planets of our solar system, humankind will want to do {{U}} 63 {{/U}} send small probes that merely fly rapidly by them. In time, we will want {{U}} 64 {{/U}} spacecraft that will go {{U}} 65 {{/U}} orbit around these alien planets, land robots on their moons, and even return rock and soil sample back to Earth. {{U}} 66 {{/U}}, we will want to send humans to their moons, on at least {{U}} 67 {{/U}} which liquid water—the fundamental requirementfor life {{U}} 68 {{/U}} we know it—is believed to be {{U}} 69 {{/U}}. For missions such as these, we will need rockets powered by a nuclear reaction {{U}} 70 {{/U}}igniting chemicals. Chemical rockets have served us well. But the {{U}} 71 {{/U}} low amount of energy that they can deliver for a given mass of fuel is a severe {{U}} 72 {{/U}} when dispat A. researching B. exploring C. developing D. identifying 查看答案 我来回答: 提交 最新试题 ●    [判断题]信号是指示列车运行和调车作业的命令，有关行车人员必须严格执行。 ●    [单选题]交流电的角频率ω等于（ ）。 ●    [多选题]健康管理的风险管理如何监管参保人员的诊疗行为( ) ●    从程序设计观点看，既可作为输入设备又可作为输出设备的是______。 ●    [单选题]特种作业人员必须年满( )周岁。 ●    [判断题]施工升降机运行到最上层或最下层时,可以采用限位装置作为停止运行的控制开关。 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