园艺商品营销的宏观环境主要包括政治和法律环境、（）、生态环境、社会文化环境和科学技术环境等。

空气和废气的环境监测技术规范中规定，灰尘自然沉降量的采样高度，以（）米最为适宜。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

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（）.

空气和废气的环境监测技术规范中规定，灰尘自然沉降量的采样高度，以（）米最为适宜。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

国家支持环境保护科学技术研究、开发和应用，鼓励环境保护产业发展，促进环境保护信息化建设，提高环境保护科学技术水平。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。