挑战习题
1/5单选题
难度:

1.放风筝时,风筝受到拉力作用,这个力的施力物体是(  )
A
B 地球
C 线绳
D 风筝
提示1:
IOmmluWFiOWPr+WIpOaWreWPl+WKm+eJqeS9k+aYr+mjjuetnQ==
提示2:
IOe7memjjuetneeahOaLieWKm+aYr+aLtOWcqOmjjuetneS4iueahOe7hue6vw==
正确答案:Qw==
6YCa6L+H57uz5a2Q5ouJ6aOO562d77yM5LiO6aOO562d5o6l6Kem55qE5piv57uz5a2QLiDpo47nrZ3lr7nnu7PlrZDmnInkuIDkuKrlkJHkuIrnmoTmi4nlipvvvIznlLHkuo7niankvZPpl7TlipvnmoTkvZznlKjmmK/nm7jkupLnmoTvvIzlkIzml7bnu7PlrZDkuZ/kvJrlr7npo47nrZ3mnInkuIDkuKrlkJHkuIvnmoTmi4nlipsuIOaJgOS7pemjjuetneWPl+WIsOS4gOS4quWQkeS4i+eahOWKm+eahOS9nOeUqO+8jOi/meS4quWKm+eahOaWveWKm+eJqeS9k+aYr+e7s+WtkC4gPGJyPuaVhemAie+8mkMuIA==