【简答题】通电螺线管附近小磁针静止时,N极指向如图所示,则螺线管的A端是 ______极,电源的D端是 ______极.
【单选题】下列不属于泡沫灭火系统检查和维护中系统月检内容的是( )
【单选题】近视患者,女,15岁,近视每年加深-0.75D,以前从未戴过角膜接触镜,现要求验配角膜接触镜达到较好的视力和防止近视加深,检查其眼部和全身情况适合佩戴角膜接触镜。该患者的检查结果如下:验光处方:OD:-5.50DS/-2.00DC×175,矫正视力1.2;OS:-6.00DS/-2.00DC×175,矫正视力1.2。角膜曲率计度数:OD:43.50D(7.76mm)@175和45.50D(7.42...
【简答题】What is meant by “It’s no wonder many British people think in sporting seasons rather than years.”? What kind of role do sports play in the lives of British people? Can you name some sports that first...