题目内容

W7805输出电压 V,而W7912则输出电压V。

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The cultivated land in the U.S. makes up ___ ____ of the total land, and people who are engaged in farming make up only 2.7% of the total population.

A. 21%
B. 31%
C. 41%
D. 51%

The Constitution of the United States provides that __ ____ shall be President of the Senate.

A. the Secretary of State
B. the Chief Justice
C. the President
D. the Vice President

The typical organizational pattern for elementary and secondary schools in the United States is that of ____ ___ .

A. classified schools
B. vocational schools
C. graded schools
D. public schools

In the 1920s, Black Literature developed into an upsurge which has come to be known as ____ ___ .

A. the Manhattan Renaissance
B. the Harlem Renaissance
C. the Black Revival
D. the African-American Rebirth

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