【单选题】【消耗次数：1】
下列各形体均属于曲面立体的是（ ）。
①
三棱台、四棱台、无棱台
②
三棱锥、圆锥、四棱锥
③
三棱锥、三棱台、立方体
④
球体、圆锥体、圆柱体
参考答案：
复制
纠错
相关题目
【单选题】
侧棱长为10，高为6的正三棱锥的底面积是（ ）
①
<img class="kfformula" src="20190809/1565327194325168.png" data-latex="60"/>
②
<img class="kfformula" src="20190809/1565327194151271.png" data-latex="48\sqrt {3}"/>
③
<img class="kfformula" src="20190809/1565327194214174.png" data-latex="24"/>
④
<img class="kfformula" src="20190809/1565327194795377.png" data-latex="30"/>
【单选题】
带切口三棱锥的三视图正确的是<img src="https://file.icve.com.cn/ssykt/612/1019/993FEC45F09DCEE161CBCB1E01C2CC55.png"/>
①
<img src="https://file.icve.com.cn/ssykt/182/242/2D93C9C0D7E7C1DB10E4A19FFB151032.png">
②
<img src="https://file.icve.com.cn/ssykt/806/563/C988CDCABF9549CBA1EF8D59C4196DAD.png">
③
<img src="https://file.icve.com.cn/ssykt/781/281/C344661011811700A3609B4D1742E2F6.png">
④
<img src="https://file.icve.com.cn/ssykt/469/867/757D8D6A89B8454C01577E33C252B1AA.png">
【单选题】
下列关于棱台说法错误的一项是（ ）。
①
正四棱台上下底面为水平面，左右侧面为正垂面，则前后侧面为铅垂面
②
所有的棱线延长后仍应汇交于一公共顶点，即锥顶
③
棱台是棱锥顶部被平行于底面的平面切割后形成的
④
棱台的两个底面为相互平行的相似的平面图形
随机题目
【简答题】
Translate the following sentence into English.他五十多岁了，但看上去比实际年龄年轻。
【简答题】
Directions: Fill in the blanks with the phrases given below. Change the form if necessary.[comprise of; vote for; access to; wake up; be hooked to; in the long run; work at; to ones joy; pay off; be associated with]6. Here, the people[填空1]the electors from states who then choose the president.
【简答题】
1.给下列词加上适当后缀构成名词。admit[填空(1)]accept[填空(2)]adopt[填空(3)]adapt[填空(4)]
【简答题】
Direction: Fill in the blanks with the words given below. Change the form if necessary.[expand; abuse; knowledge; narrative; plantation; property; oppressive; extremely; rebel; abolitionist]1. If I calmly pocket the[填空1], Ill be laughed at.
【简答题】
Directions: Fill in the blanks with the phrases given below. Change the form if necessary.[comprise of; vote for; access to; wake up; be hooked to; in the long run; work at; to ones joy; pay off; be associated with]1. Learning a foreign language may be difficult at the beginning, but your hard work will[填空1].
【简答题】
Directions: Translate sentence by using “nothing more than”.2. To you, __________(我也不过是一只狐狸)like a hundred thousand other foxes.
【简答题】
Translate the following sentence into English.无论刮风还是下雨，他都坚持早起在附近的公园跑步。
【简答题】
Translate the following sentence into English.他们终于想出了一个好主意来解决这个问题。
【简答题】
Direction: Fill in the blanks with the words given below. Change the form if necessary.[integrity; conscience; yield; appoint; assure; ensure; demonstrate; clarify; preserve; scarce]7. Though he walked free from court, his[填空1]kept bothering him for the wrong doing he had done.
【简答题】
Direction: Fill in the blanks with the words given below. Change the form if necessary.[privilege; component; stagnant; entangle; superficial; arresting; expound; penetrating; indulge; click]1. Their national economy is[填空1].