In addition to breathing with its lungs, an adult frog has the ability to breathe through its ______.

A . Supplements B . Annual Summary C . Navigational Warnings D . Notices to Mariner

A . supplement B . replace C . add D . eat

A . Set the SSID value in the client software to public. B . Configure open authentication on the AP and the client. C . Set the SSID value on the client to the SSID configured on the AP. D . Configured MAC address filtering to permit the client to connect to the AP.

A . pushed ahead B . towed alongside C . towed astern D . Any of the above

A . additives B . water C . grease D . acid solutio

A . Set the SSID value in the client software to public. B . Configure open authentication on the AP and the client. C . Set the SSID value on the client to the SSID configured on the AP D . Configure MAC address filtering to permit the client to connect to the AP

A . z/OS B . Linux C . Sun Solaris 9 D . Microsoft Windows 2003

A . Mozilla for AIX B . An Apache compliant Web server C . Web Based System Manager （WebSM） D . Websphere Application Server Community Editio

A . increase scavenge air pressure B . reduce fuel booster pump pressure C . adjust the fuel rack D . retard fuel injector timing

A . Electricity B . Chain reaction C . Pressure D . Smoke

A . living standards B . survival condition C . chance of survival D . technical specificatio

A．Arabs seem to keep a certain distance when talking B．two Arabs talking to each other tend to stand very close C．both Arabs and Japanese tend to crowd together D．Japanese, in their closeness, like to maintain formality

Until a few years ago, the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition. Bad breath can happen whenever the normal flow of saliva (唾液) slows. Our mouths are full of bacteria feeding on protein in bits of food and shed tissue. The bacteria emit evil smelling gases, the worst of which is hydrogen sulfide (硫 化物). Mouth bacteria thrive in airless conditions. Oxygen rich saliva keeps their numbers down. When we sleep, for example, the saliva stream slows, and sulfur producing bacteria gain the upper hand, producing classic “morning breath”. Alcohol hunger, too much talking, breathing through the mouth during exercise anything that dries the mouth produces bad breath. So can stress, though it’s not understood why. Some people’s breath turns sour every time they go on a job interview. Saliva flow gradually slows with age, which explains why the elderly have more bad breath trouble than younger people do. Babies, however, who make plenty of saliva and whose mouths contain relatively few bacteria have characteristically sweet breath. For most of us, the simple, dry mouth variety of bad breath is easily cured. Eating or drinking starts saliva and sweeps away many of the bacteria. Breakfast often stops morning breath. Those with chronic dry mouth find that it helps to keep gum, hard candy, or a bottle of water or juice around. Brushing the teeth wipes out dry mouth bad breath because it clears away many of the offending bacteria. Surprisingly, one thing that rarely works is mouthwash. The liquid can mask bad breath odor with its own smell, but the effect lasts no more than an hour. Some mouthwashes claim to kill the bacteria responsible for bad breath. The trouble is, they don’t necessarily reach all offending germs. Most bacteria are well protected from mouthwash under thick layers of mucus (粘液). If the mouthwash contains alcohol-as most do-it can intensify the problem by drying out the mouth. 第31题：The phrase “emanate from” in Paragraph 1 most probably means “________”. A) thrive on B) account for C) originate from D) descend from

A．He can use the $ 3,000 for investment for one month. B．He can be insured against loss through pound sterling devaluation or floating down during the month. C．Because the rate of these purchases is fixed whatever happens to exchange rates in the meantime. D．Both Ｂ and Ｃ.

A.pushed ahead B.towed alongside C.towed astern D.Any of the above

A．A.除所学的专业外，约翰在大学还选修了一些经济学课程，以便毕业后能找到一份好工作。 B．B.除了所学专业，约翰在大学还自学了一些经济学课程，这样毕业后就找到了一份好工作 C．C.约翰毕业后就找到了一份好的工作，因为除了所学专业，还选修了其他一些大学的课程 D．D.约翰大学一毕业就找到一份好工作，因为他在本专业之外，还附带学了一些经济学课程