输送带打滑的原因及防止打滑的措施?
参考答案:
打滑主要原因是输送带与滚筒之间摩擦力不够,防止的办法是将输送带拉紧或停车后在主动滚筒和下段输送带之间撒上锯末或煤粉将水吸干。
— Lorry, how do you think an Englishwoman will feel if you ask how old she is?
— Well. She may probably feel________. [ ]
A. absurd
B. embarrassed
C. satisfied
D. awful
境内证券经营机构取得的内资股承销业务资格证书的有效期为签发日起的2年内,2年后自动失效。( )