UC知道几道英语数学题
来源：百度知道 编辑：UC知道 时间：2024/05/12 11:56:08
希望附上简单的解析，谢谢
1.Ten chairs are evenly spaced around a round table and numbered clockwise from 1 through 10.Five married couples are to sit in the chairs with men and women alternating, and no one is to sit either next to or directly across from his or her spouse. How many seating arrangements are possible?
A.240 B.360 C.480 D.540 E.720
2.For each positive integer n, the mean of the first n terms of sequence is n. What is the 2008th term of the sequence?
A.2008 B.4015 C.4016 D.4030056 E.4032024
3.Quadrilateral ABCD has AB=BC=CD, <ABC=70，and <BCD=170. What is the degree measure of <BCD?
A.75 B.80 C.85 D.90 E.95
1.Ten chairs are evenly spaced around a round table and numbered clockwise from 1 through 10.Five married couples are to sit in the chairs with men and women alternating, and no one is to sit either next to or directly across from his or her spouse. How many seating arrangements are possible?
A.240 B.360 C.480 D.540 E.720
2.For each positive integer n, the mean of the first n terms of sequence is n. What is the 2008th term of the sequence?
A.2008 B.4015 C.4016 D.4030056 E.4032024
3.Quadrilateral ABCD has AB=BC=CD, <ABC=70，and <BCD=170. What is the degree measure of <BCD?
A.75 B.80 C.85 D.90 E.95
第2题选B
这道题叙述有点问题，没大看明白，按我的理解是B，因为是求中间项，除以2就可以了。
第三题抄错了，BCD已经给出。
张椅子平均地被在附近隔开圆的桌子和有限的顺时针的从 1 经过??窾已婚的夫妇要在椅子中由于男人坐和女人交互的,而且没有人要然后也坐到或直接的在～对面他或她的配偶。 多少坐安排是可能的?
A.240 B.360 C.480 D.540 E.720
2.For 每实在完整的事物 n,序列的第一 n 术语的方法是 n 。 序列的第 2008个术语是什么?
A.2008 B.4015 C.4016 D.4030056 E.4032024
3.Quadrilateral ABCD 有 AB=西元前=激光唱碟， <美国广播公司=70 ，和 <BCD=170. 程度对～的衡量是什么 <BCD?
A.75 B.80 C.85 D.90 E.95