水平角的观测值应取各测回的平均数作为观测成果。
参考答案:对
________ to meet me at the gate of the park; I'll be waiting there.[ ]
A. Not to forget
B. Not forget
C. Forget not
D. Don't forget
轮椅选择座位宽度时常在测量坐下时两臀间或两股之间的距离基础上再加()
A.2.5cm
B.5cm
C.10cm
D.20cm
E.40cm