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【单选题】
要将一个曲柄摇杆机构转化成双摇杆机构，可以用机架转换法将 。A.
原机构的曲柄作为机架
B.
原机构的连杆作为机架
C.
原机构的摇杆作为机架
D.
无法得到双摇杆机构
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【简答题】The slaves in the south were (tortured) during the Civil War.
【简答题】Radical Republicans in Congress, however, denounced the plan for being too ________on the South and for not securing any rights for the freed slaves.
【单选题】The African ancestors of today's black Americans were brought to the US as slaves in the seenth, eighth, and nineth century. They worked on farms, especially the large farms in the southe...
A.
. African ancestors of today's black Americans.
B.
. The opposition to slavery in the United States.
C.
. Slavery in the United States.
D.
. The right of black Americans.
【简答题】我国最基层的人民政府是（ ）
【判断题】In the South, slaves were used both agricultural and non-agricultural employment, especially in highly productive farming and stock-raising for the West Indian market in southern Rhode Island, Long Is...
A.
正确
B.
错误
【单选题】Before American civil war, slaves in the south mainly did the job of ______.
A.
manufacturing
B.
tourism
C.
handicrafts
D.
plantation
【单选题】President Lincoln's ______ was to free black slaves in the south in American history.
A.
Proclamation of Emancipation
B.
Free Speech
C.
Liberation Speech
D.
Inaugural Speech
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