Spread spectrum simply means that data is sent in small pieces Over a number of the (46) frequencies available for use at any time in the specified range. Devices using (47) spread spectrum (DSSS) communicate by (48) each byte of data into several parts and sending them concurrently on different (49) . DSSS uses a lot of the available (50) , about 22 megahertz (MHz) .
（46）是（）Spread spectrum simply means that data is sent in small pieces Over a number of the (46) frequencies available for use at any time in the specified range. Devices using (47) spread spectrum (DSSS) communicate by (48) each byte of data into several parts and sending them concurrently on different (49) . DSSS uses a lot of the available (50) , about 22 megahertz (MHz) .
（47）是（）Application development increasingly means Windows development, and the popularity of visual development tools has (66) in tandem with Windows itself. These tools create beautiful windows wing (67) and their fast development cycles and easy learning curves make them a good (68) for many types of PC development projects. Today’s developers are leveraging these tools and the abundance of cheap, powerful PCs to shift the balance of power to the desktop. As the world moves inexorable toward Window and other (69) . user interfaces, developers can choose from an abundance of (70) oriented tools. Popular examples include Microsoft Corp’s Visual Basic, powersoft Corp’s PowerBuilder, Gupta Technology Corp’s SQL Windows, and so on.
（70）处填（）。我来回答:
