[单选题]
98.29: A 50-kg student stand b qb4l:src*uv 191cids on a scale ing/-uc6kl :h eo-akf/t an elevator. At the instant the elevator has -/g fo6ah/le:kktu-ca downward acceleration of $1.0\; m/s^{2}$ and an upward velocity of 3.0 m/s, the scale reads approximately
