A:a和c的碱基序列可以互补
B:b和c的碱基序列可以互补
C:a中 的比值与b中 的比值相同
D:a中 的比值与c中 的比值相同
下列各句中,没有语病的一句是 ( )
____This is a picture of my uncle's family. These are my uncle and aunt. Those are their children(孩子),Li Ming and Li Ling.
____ Look at the picture. This is my friend. His name is Jack.
____Here's a photo of my family. These are my grandparents. Those are my parents. This is me.
____Look at this picture. This is my father and that is my mother.
____ Look at the three boys. They are my cousins and me.
A B C
D E
读拼音,写词语。
bō lán zhuàng kuò
shuǐ pīng rú jìng
bá dì ér qǐ
____