To make members of a team perform better, the trainer first of all has to know their ______ and weaknesses.
A:strengths
B:manner
C:impression
D:values
解释加线词语的意思。
①在此基础上,持之以恒地进行各种尝试。
持之以恒:____
②一旦产生小的灵感,相信它的价值,并锲而不舍地把它发展下去。
锲而不舍:____