子女对父母的赡养扶助义务,既包括承担、提供父母必要的生活费用和赡养费用,也包括在精神上给予父母必要的慰藉。( )
参考答案:对
Usually what weighs us down are not the burdens of life, but how we handle _______ .[ ]
A. this
B. them
C. it
D. us
整铸支架式义齿的基托厚度约为()
A.0.5mm
B.1mm
C.2mm
D.3mm
E.4mm