Vessels must be（）valid certificate of nationality or certificated of registry or license.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

The（）may examine or re-examine the goods or take samples from them straightaway in the absence of the consignee or the consignor whenever it considers this necessary.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.

Banks have no liability for any delay or loss caused by postal or telex failure.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

贾湖骨笛

中国音乐的历史分期是依据政体以及朝代的变更进行的。

中国古代稻米纬度最北的是河南贾湖。

出土的贾湖骨笛上所有孔的误差都小于五个音分。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。