秦始皇统一六国,创立了
A:分封制度
B:三省六部制
C:宗法制度
D:皇帝制度
读拼音,写汉字。
shī zi
bān mǎ
hóu zi
xīnɡ xinɡ
xīng fèn
____
把墨汁用水稀释后取出一滴,放在显微镜下观察,如图所示,下列说法中正确的是( )
at accost of take root break down on display seek out
on board be tired of in place of serve as hold up
be responsible for return to normal