— By the way, do you have e-mail address?
— Sure, I'll write for you.
A:a
B:an
C:the
D:不填
关于电流,下列说法中正确的是( )
I was found I was carried _____ on the earth and fell over.
图中是抛物线拱桥,P处有一照明灯,水面OA宽4m,从O、A两处观测P处,仰角分别为α、β,且tanα= 12 , tanβ=32 ,以O为原点,OA所在直线为x轴建立直角坐标系.
下例说法与实际情况相符合的是( )