一I think I've got a bad cold,Doctor.Shall I take some medicine?
一No need.Your body itself is able to the virus. Just drink more water and rest.
A:catch
B:fight
C:lose
D:hide
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”).
如图,直线AB,CD相交于点O,EO⊥CD于点O,∠AOE=36°,则∠BOD=( )