What is said about cell phone use in the mid一1 980s in paragraph 5？

A . doubt B . question C . wonder D . consideratio

A .  6 dBm B .  19 dBm C .  5 dBm D .  7 dBm

A . All Service Agent transactions are inbound requests secured by encryption (cryptographic processor card) Kerberos, and Hypertext Transfer Protocol Secure (HTTPS).  B . The AT&T Global Network Services (AGNS ) phone connection generates system IDs and passwords for the client every six months. Service Agent has no inbound capability. C . All Service Agent transactions are outbound requests secured by encryption (Hypertext Transfer Protocol Secure (HTTPS) or POST). Service Agent has no inbound capability.  D . The transmissions from Service Agent can be either by Internet or the AT&T Global Network Services (AGNS) phone connection. Service Agent transactions are inbound requests generated by a point to point connection.

A . VPI B . VCI C . VPI and VCI D . Specific 4 bytes label E . None of above

A．It is easy to empty. B．It has an extra long cord. C．It has three different settings. D．It can cut up to eight sheets at a time.

A．Stereos B．Headphones C．Calculators D．Cell phones

A．It is a profitable industrial zone. B．It used to have a thriving ecosystem. C．It is an attractive tourist site. D．It is a hazardous environment.

A．When you watch it, you will certainly feel cold. B．Something strange will puzzle everyone, including scientists. C．Unexpected things will make you excited and surprised. D．Even the bravest ones will be too frightened to go on watching.

A．On my opinion B．To my opinion C．In my opinion D．For my opinion

A．simplesentence B．compound sentence C．complexsentence D．compound-complex sentence

A．They are much more than neurons. B．They are only support cells. C．They send neural signals. D．They are unique to humans.

A．It doubled its sale of e-readers during the Christmas season. B．It controls 73 percent of the tablet device market. C．It charges customers less in credit card transaction fees. D．It has long been selling its traditional personal computers

For some fifty million years, despite all its eccentricities, the sea cucumber has subsisted on its diet of mud. It is adaptable enough to live attached to rocks by its tubefeet, under rocks in shallow water, or on the surface of mud flats. Common in cool water on both Atlantic and Pacific shores, it has the ability to suck up mud or sand and digest whatever nutrients are present. Sea cucumbers come in a variety of colors, ranging from black to reddish-brown to sand-color and white. One form. even has vivid purple tentacles. Usually the creatures are cucumber-shaped hence their name and because they are typically rock inhabitants, this shape, combined with flexibility, enables them to squeeze into crevices where they are safe from predators and ocean currents. Although they have voracious appetites, eating day and night, sea cucumbers have the capacity to become motionless and live at a low metabolic rate — feeding sparingly or not at all for long periods, so that the marine organisms that provide their food have a chance to multiply. If it were not for this faculty, they would devour all the food available in short time and would probably starve themselves out of existence. But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs. When attacked, it squirts all its internal organs into the water. It also casts off attached structures such as tentacles. The sea cucumber will eviscerate and regenerate itself when it is attacked or even touched; it will do the same if the surrounding water temperature is too high or if the water becomes too polluted. The passage mainly discusses A．the reason for the sea cucumber's name. B．what makes the sea cucumber unusual. C．how to identify the sea cucumber. D．places where the sea cucumber can be.

A．immune B．impossible C．improbable D．imminent