What is the numerical range of a char？（）   

A .  0 . . . 32767 B .  0 . . . 65535 C .  –256 . . . 255 D .  –32768 . . . 32767 E .  Range is platform dependent.

A . atmospheric noise and radiated power B . the frequency band selected and time of day or night C . interference and position of the moon D . radiated power and nearness to shore

A . A syntax error will result as you cannot specify more than one partition in the same statement B . All data in p1 and p3 partitions are removed and the table definition is changed C . All data in p1 and p3 partitions are removed, but the table definition remains unchanged D . Only the first partition (p1) will be dropped as only one can be dropped at any time

A、Gain control B、Sensitivity time control C、Fast time constant D、Pulse length control

A .  Disk based heartbeats B .  Heart beating via IP aliasing C .  IP aliases for the non-service addresses D .  A single subnet for all non-standby adapter

A . speed begins to drop B . stops C . receives ice damage D . becomes icebound

A . 正确 B . 错误

A .  0…32767 B .  0…65535 C .  –256…255 D .  32768…32767 E .  Range is platform dependent.

A . 20 to 30 B . 200 C . 100 D . 450

A . fixed B . matched C . fitted D . equal

A .  The FIB is derived from the IP routing table and is optimized for maximum lookup throughput.   B .  The FIB table is derived from the Address Resolution Protocol table， and it contains Layer 2  rewrite （MAC） information for the next hop. C .  When the FIB table is full， a wildcard entry redirects traffic to the Layer 3 engine. D .  The FIB lookup is based on the Layer 2 destination MAC address. E .  None of the other alternatives apply

A . Refrigerator B . Refrigerant C . Cooling medium D . Brine

A .  -27 -- 27-1 B .  0 -- 216-1 C .  -215 -- 215-1 D .  -231 -- 231-1

A . Greater than the declination and both are of the same name B . Less than the declination and both are of the same name C . Greater than the declination and both are of contrary name D . Less than the declination and both are of contrary name

A．$41,600 B．$47,000 C．$52,000 D．$61,000 E．$75,000

As the mountains sank, ocean water charged over the lowest arts of the remaining land, forming a series of twisting inlets and lagoons (咸水湖) . The highest parts of the former mountain range, nearest the shore, remained as islands. ______【47】Marine fossils found here were 225 feet above sea level, indicating the level of the shoreline prior to the glacier. The 2, 500-mile-long rocky coastline of Maine keeps watch over nearly two thousand islands. Many of these islands are tiny and uninhabited, but many are home to thriving communities. Mt. Desert Island is one of the largest, most beautiful of the Maine coast islands. Measuring 16 miles by 12 miles, Mt. Desert Island was essentially formed as two distinct islands. ______【48】. For years, Mt. Desert Island, particularly its major settlement, Bar Harbor, afforded summer homes for the wealthy. Recently though, Bar Harbor has become a rapidly growing arts community as well. But the best part of the island is the unspoiled forest land known as Acadia National Park. Because the island sits on the boundary line between the temperate (温带) and sub-Arctic zones, the island supports the plants and animals of both zones as well as beach, inland , and alpine (高山 的) plants. ______【49】The establishment of Acadia National Park in 1916 means that this natural reserve will be perpetually available to all people, not just the wealthy. Visitors to Acadia may receive nature instruction from the park naturalists as well as enjoy camping, cycling, and boating. Or they may choose to spend time at the archeological museum, learning about the Stone Age inhabitants of the island. The best view on Mt. Desert Island is from the top of Cadillac Mountain. ______【50】. From the summit, you can gaze back toward the mainland or out over the Atlantic Ocean and contemplate the beauty created by a retreating glacier. A. It also lies in a major bird migration lane and is a resting spot for many birds. B. Mt. Desert Island is one of the most famous of all of the islands left behind by the glacier. C. The wealthy residences of Mt. Desert Island selfishly keep it to themselves. D. The term comes from the activity of the Ice Age. E. This mountain rises 1, 532 feet, making it the highest mountain on the Atlantic seashore. F. It is split almost in half by Somes Sound, a deep and narrow stretch of water seven miles long. (46)