游程检验统计量在大样本情况下服从()
A.卡方分布
B.正态分布
C.二项式分布
参考答案:B
John walked down the stairs quickly. He didn't _____________ the lift.[ ]
A. took
B. taked
C. take
D. takes
内燃机活塞连杆机构是应用曲柄滑块机构原理。