Jack eats dinner with his parents 7 o'clock every day. [ ]
A. in
B. at
C. for
D. of
答案:B
7,2l,63,189,( )
A.378
B.567
C.667
D.756
机动车仪表板上(如图所示)亮,提示发电机向蓄电池充电。