孙中山在领导中国民主革命的斗争中愈挫愈奋，直到临终前还在遗嘱中告诫革命党人：“革命尚未成功，同志仍须努力。” 这里“革命尚未成功”主要是指(    )

   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.

读俄罗斯、印度图，回答下题。

在下图长骨的解剖模式图，请据图回答下列问题：

（1）根据图上的序号，填写名称：

（2）图中A的腔隙内容纳着____ ，具有____ 功能。
（3）D内血管中的血液对骨具有____ 作用；D内层的____ 细胞对骨的____ 与骨折后的____ 有着重要作用。