Shanghai lies _______ the east of China and _______ the northeast of Guangdong.
A:in; to
B:in; in
C:to; to
D:to; in
课文《太空一日》中出现了什么意外?这种共振是正常现象吗?这种现象后来解决了吗?表现了杨利伟什么精神?