【单选题】What does Senator Charles Schumer advocate?
A.
Setting guidelines for advertising on websites.
B.
Banning the sharing of users' personal information.
C.
Formulating regulations for social-networking sites.
D.
Removing ads from all social-networking sites.
【简答题】如图所示黏土层,地表瞬时施加无限分布荷载 ,求: (1)加荷半年后地基沉降; (2)固结度达到70%时所需时间。
【多选题】平面图(俯视图)可反应场景中物体的哪些要素( )
【单选题】下列选项中,哪个输出是有触点输出,响应速度慢,适用于低频大功率直流或交流负载?( )
【单选题】What does the author mainly discuss in the passage?
A.
Students'neglect of protecting their privacy online.
B.
Internet helping police maintain school and public order.
C.
Social networking sites having bad influence on teenagers.
D.
Police's unwelcome interference in students'online activities
【单选题】软 磁材料一般 用于 ,硬 磁 材料 一般 用于 , 矩磁材料 一般 用于 。