俄国是近代史上侵占我国土地最多的国家，总计200万平方公里。
参考答案：错
We had no one ______ us, for we could deal with the case all by ourselves.
A. help B. to help C. helped D, helps
最常见闭经类型是:
A．子宫性闭经
B．卵巢性闭经
C．垂体性闭经
D．下丘脑性闭经
E．原发性闭经
