He decided to devote all his time and effort _____ scientific investigation.
He decided to devote all his time and effort \_\_\_\__ scientific investigation.
表示
如图3所示，a、b、c是一条电场线上的三个点，电场线的方向由a到c，a、b之间的距离等于b、c之间的距离，用和Ea、 Eb、Ec分别表示a、b、c三点的电势和电场强度，下列选项一定正确的是（ ）．图3
如图3所示，a、b、c是一条电场线上的三个点，电场线的方向由a到c，a、b之间的距离等于b、c之间的距离，用和Ea、 Eb、Ec分别表示a、b、c三点的电势和电场强度，下列选项一定正确的是（ ）．图3
T的原子结构示意图是____．用化学方程式表示工业常用冶炼T单质的原理是____．
T的原子结构示意图是\_\_\_\_．用化学方程式表示工业常用冶炼T单质的原理是\_\_\_\_．
An old man got badly _____ in the road accident yesterday.
An old man got badly \_\_\_\__ in the road accident yesterday.
She is more beautiful than _____ in the class.
She is more beautiful than \_\_\_\__ in the class.