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。

肺炎一般有发烧、咳嗽、气喘等症状。重者面色青灰、呼吸困难、精神极差，甚至会抽风、昏迷。

某幼儿初起感冒症状，两周后出现典型的阵发性咳嗽，成串的连续十几声至数十声，尤以夜间为频。该幼儿可能患了（）。

某幼儿初起发烧，咳嗽、气喘，至夜间面色青灰，呼吸困难，抽风，可能患了（）

肺炎一般有发烧、咳嗽、气喘等症状。重者面色青灰、呼吸困难、精神极差，甚至会抽风、昏迷。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。