北魏、西夏、辽、金分别是由下列哪些民族建立的( )
A.鲜卑、契丹、女真、党项 B.契丹、鲜卑、党项、女真C.鲜卑、党项、契丹、女真 D.鲜卑、契丹、党项、女真
参考答案:C
Many ______ Chinese cultural relics, which have been lost over ______ last century, have started to return home.
A./; the
B./; /
C.the; a
D.the; the
配制一定物质的量浓度的溶液时,要用到下列仪器中的( )
A.
B.
C.
D.