A:8
B:4
C:2
D:1
看拼音写词语。
xiě xìn
qí guài
gū niang
shù zǐ
jǔ shǒu
jīng yà
____
正常人的心脏的四个腔中,流动着动脉血的两个腔是( )
First, please read the ____ (introduce) of the book. Then tell me your opinion about it.
读“岩石圈物质循环图”,回答下题.