___________ is known to all that Shenzhou VI was launched successfully.
A:As
B:What
C:It
D:That
关于北纬30°纬线的说法,错误的是( )
将问句与答句连线配对。
① Good afternoon, Danny. ____ A. Yes, it is.
② Hello, children. ____ B. Hello, Mr. Wang.
③ Is this your cake? ____ C. Good afternoon, Alice.
如图所示,一个重30N、体积为0.002m3的物体用绳子悬挂着,现将物体完全浸没在烧杯的水中,物体受到的浮力是____ N(g取10N/kg),此时静止,绳子受到的拉力为____ N.物体浸没水中后继续下沉的过程中,水对杯底的压强____ (填“增大”、“不变”或“减小”).释放绳子后,物体将____ (填“上浮”或“下沉”).
已知c>0,设命题p:函数y=cx为减函数.命题q:当x∈12,2时,函数fx=x+1x>1c恒成立.如果“p∨q”为真命题,“p∧q”为假命题,求c的取值范围.