【简答题】已知数列 为等比数列,且 ,设等差数列 的前 项和为 ,若 ,则
【单选题】细长轴工件图样上的键槽画法用()剖视表示。
【判断题】20点的主机没有扩展连接器,所以不能连接I/O扩展单元
【多选题】Choose the following sentences if you think that "serve" has the same meaning as "satisfying".
A.
But the study shows that principal among them is the work of library staff to serve the information needs of the communities.
B.
This could mean the closure of thousands of small businesses which serve the community.
C.
Almost no politician in the US runs for office without begging huge campaign funds from the rich – so when they are elected, they must serve their interests, not ordinary Americans’.
D.
Leo is currently serving a life sentence for murder.
【简答题】已知数列 为等比数列,且 ,设等差数列 的前 项和为 ,若 ,则 .
【单选题】细长轴工件图样上的()画法用移出剖视表示。
【单选题】细长轴工件图样上的键槽画法应采用( )剖视表示。