That girl is in our class. Do you know _____ name? [ ]
A. her
B. she
C. he
D. his
答案:A
如图,在平面直角坐标系中,以A(5,1)为圆心,以2个单位长度为半径的⊙A交x轴于点B、C解答下列问题:
(1)将⊙A向左平移_______个单位长度与y轴首次相切,得到⊙A',此时点A'的坐标为________,阴影部分的面积S=_____________;
(2)求BC的长。
电气舵角指示器在左右各舵角的指示舵角与实际舵角之间的偏差().
A.皆应为0
B.≯0.5º
C.≯1º
D.≯2º