下列交换加数位置的变形中,正确的是( )
A:-14+56+23-12=56+23+14-12
B:-8+12-16-23=12-8-16-23
C:-4.2+5.7-8.4+10=5.7+4.2-8.4+10
D:-3213+514-317-514+1267=514-514-3213+317+1267
根毛细胞能够吸水的原因是( )
将下列句子改为陈述句。
①人们怎么不希望车子能停下来,不希望时间能停下来?
②人难道可以没有一点精神吗?
——据吕思勉《魏晋南北朝史》
It's Sunday morning. There are many people in the park, some boys are playing basketball. There are some girls under a big tree. They're singing and dancing. What are those women doing? They are drinking tea. Look at the woman in a blue coat. Who's she? She's my mother. She is talking to Edward. Edward is her student. He is a good student. He studies hard. He's good at all the subjects. And he's friendly to all his teachers and his friends.