问题
选择题
Try your best to run fast, ________ you will fall behind others.[ ]
A. and
B. but
C. so
D. or
答案
答案：D
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Try your best to run fast, ________ you will fall behind others.[ ]
A. and
B. but
C. so
D. or
答案：D
32，该锚杆最不利荷载效应承载能力极限状态基本组合(各荷载分项系数均取1.0)的拔力值N为130kN，试问当采用砂浆与岩石间的粘结强度特征值f为0.4MPa的水泥砂浆灌浆，锚孔直径为100mm，该锚杆插入岩石的锚固长度最小值la(mm)与下列何项数值最接近().