昆虫飞行时翅膀要振动.蝴蝶飞行时翅膀每秒振动5—6次，蜜蜂飞行时翅膀每秒振动300-400次，为什么凭听觉能发现飞行的蜜蜂而不能发现飞行的蝴蝶？

简述昆虫的翅与其飞行速度的关系。

能在无生命培养基中生长繁殖的最小的微生物是（）

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

目标（工具点）捕捉不能捕捉到（）。

计算VaR的主要方法中，可以捕捉到市场中各种风险的是（）。

蝙蝠能在飞行中捕捉到昆虫的机制是（）。?

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。