皮皮学，免费搜题
登录
搜题
【单选题】
一个长为8cm，宽为6cm的长方形木板在桌面上做无滑动的滚动(顺时针方向)如下图所示，第二次滚动中被一小木块垫柱而停止。使木板边沿AB与桌面成30°角，则木板滚动中，点A经过的路径长为( )cm．A.
4π
B.
5π
C.
6π
D.
7π
E.
8π
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Which of the following shows the proper pronunciation of 'whose' in the sentence '‘In America， Li stayed in a family whose landlady could help him with his English'?
A.
/hus/
B.
/huz/
C.
/hu:s/
D.
/hu:z/
【单选题】This is the first time _____ the president has visited the country
A.
that
B.
which
C.
when
D.
where
【单选题】睾酮口服无效，结构修饰后稳定性增加，其有效的方法为（）
A.
将17β-羟基酯化
B.
将17β-羟基氧化为羰基
C.
引入17α-甲基
D.
将17β-羟基修饰为醚
E.
引入17α-乙炔基
【单选题】As there is a power cut in the university, the president has to ______ the meeting
A.
call on
B.
call out
C.
call off
D.
call for
【简答题】投资应遵循的原则之一是结构平衡原则，按照这一原则，企业应对投资项目实施过程中的进 程进行控制。 ( )
【判断题】Let alphabet = {a,b}, Thus the regular expression a denotes {a} which is different from just the string a.
A.
正确
B.
错误
【单选题】____ the storm on the sea,it is reported that the president has put off the trip.
A.
thanks to
B.
because of
C.
due to
D.
as a result
相关题目：
参考解析：
知识点：
题目纠错 0
发布
