What made the sinan work as a compass a. lodestone b. bronze c. the square shape of the plate d. the shape of the spoon

When zhang qin went to explore west, he brought back stories of

Why does the united states constitution require that a national census be taken every ten years?

Drugs have a high potential for abuse. there is no routine therapeutic use for these drugs and they are not available for regular use. they may be obtained for “investigational use only” by applying to the u.s. drug enforcement agency. examples include heroin and lsd. which scheduled drug is this?