代赭石的功效是()。
A.息风止痉
B.重镇降逆
C.清肝明目
D.软坚散结
E.清热解毒
参考答案:B
为获得闲暇而放弃的劳动收入是指闲暇的( )。
A.平均成本
B.边际收益
C.边际成本
D.机会成本
There is ______ salt in the kitchen. Would you like to go to the store and get ______? [ ]
A. little; some
B. little; any
C. a little; some
D. a little; any