A single 802.11g access point has been configured and installed in the center of a square office. A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem (Choose three.)（）。

Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）

Where should you install the spare line module in a redundancy group?（）

 ______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame（）.

A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a（）.

The lower end of each piston rod is reduced in diameter to fit a bore in （）.

The demisters installed in a flash-type evaporator serve to （）

In C language，(58) is a collection of one or more variables，possibly of different types， grouped together under a single name for convenient handling.

In C language,(70)is a collection of one or more variables, possibly of different types, grouped together under a single name for convenient handling.

In many installations basket strainers consist of a cylindrical container in which a perforated metal or wire basket is suspendedThe bold and italic word “which” means （）.

The （） is used to measure the volume of a liquid or gas through a pipeline within any given period of time.