A:试管、蒸发皿
B:烧杯、燃烧匙
C:量筒、集气瓶
D:锥形瓶、试管
—I wanted to, but my father______ his favorite TV program.
如图,S闭合,电源电压不变,滑片P向左滑动时,各电表示数的变化情况是( )
“有心栽花花不开,无心插柳柳成荫”,“插柳”采取的方法是( )