【单选题】下列说法不正确的是,全国第四次人口普查中( )
【单选题】以下说法中正确的是
A.
若穿过一闭合曲面的电场强度通量不为零,则此闭合曲面上的电场强度处处不为零
B.
若穿过一闭合曲面的电场强度通量为零,则此闭合曲面上的电场强度处处为零
C.
若一高斯面内没有净电荷,则此高斯面上各点的电场强度必为零
D.
若一高斯面内没有净电荷,则此高斯面上各点的电场强度通量必为零
【单选题】Why might Irving's literary ability have been surprising to the English?
A.
They feared competition from American writers.
B.
They did not expect the United States to produce good writers.
C.
They disapproved of the language American writers used.
D.
They thought of the United States as a purely commercial power.
【单选题】Several times of revisions will_______ before a final product is produced for a competition.
【单选题】在实习期间,学生应遵守管理规定,然后安全生产、操作规范。()
【单选题】在实习期间,学生应遵守管理规定,然后安全生产、操作规范。()
【单选题】下列说法不正确的是,全国第四次人口普查中( )
【单选题】---I got the first prize in the English competition. ---This ____________ a celebration!
【判断题】在实习期间,学生应遵守管理规定,然后安全生产、操作规范。()