Each cover consists of two or （）panels.

Each （）consists of two or more panels.

The goal, which they are unlikely to live to see , is tocure, prevent or manage all diseasesin the next 80or so years.

A c（） sentence contains two or more clauses， one of which is incorporated in the other.

Regarding L2TP, in which two situations is a service module or service IOA required?（） (Choose two.)

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

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

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

What are two ways to verify if a WX device is configured as a hub, a spoke, or a mesh device? （）(Choose two.)

Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.

A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.

F1系列PLC—OR指令表示（）。