All the guests were dancing and singing

The Grammar-Translation Method dominated foreign language teaching（）.

A. from mid-19th century to mid-20th century

B. from 1920s to 1940s

C. from the late 18th century to early 19th century

D. from 1910s to 1930s

计算，其中D是曲线直线y=-x所围成的区域．

《婚姻法》规定：有直系血亲关系或三代以内旁系血亲关系者禁止结婚。这一政策的出发点是( )。

A．防止家族势力的过分膨胀

B．出于伦理道德的考虑

C．避免包办婚姻

D．近亲结婚会大大增加遗传病的发病几率

以下除哪项外都是妊娠病常见的发病机理？（）

A.阴血虚

B.脾肾虚

C.冲气上逆

D.气滞

E.冲任损伤

对漫溢险情的抢护原则是“预防为主，（）”。

A.护坡防冲

B.开沟导渗

C.水涨堤高

D.帮宽堤防