—No, he ________.
A:Do; don't
B:Does; don't
C:Does; doesn't
在电场中的某点放入电荷量为-q的试探电荷时,测得该点的电场强度为E;若在该点放入电荷量为+2q的试探电荷,此时测得该点的电场强度为( )
根据句意及汉语提示完成单词。
How many ______ are there in his class? ()