通过账户间划拨和转移，可以最大限度地节约现钞使用和降低流通成本，加快结算过程和货币资本的周转。（  ）

金融衍生品是指价值依赖于原生性金融工具的一类金融产品，其中，期货合约与远期合约最本质区别是（  ）。

八正散的组成药物中不含有

以下临床表现及实验室检查不符合溃疡性结肠炎重型表现的是

下列关于汇兑的表述中，正确的是（   ）。

与克山病病因有关的是

患者男，36岁。2周前发现右下后牙龈有小包，平时无明显不适。检查见右下第一磨牙咬合面龋深，穿髓孔探无感觉，叩(±)，右下第二磨牙根尖处牙龈有瘘管开口，压挤少许脓液流出。X线片见右下第一磨牙近中根尖X线透射区不规则，边界模糊。
主诉牙应诊断为

注射用头孢曲松钠与含钙类溶液合并用药有可能导致致死性结局不良反应。注射用头孢曲松钠说明书中应注明（     ）

下列选项中，与“中国－香港”的逻辑关系相同是（  ）。

患儿，4岁。2天来，咳嗽、咳痰、发热、鼻塞、流涕、微恶风寒，咽红而痛，苔薄黄。证属风热袭肺，治当疏风清热、宣肺止咳，宜选用的中成药是

Passage1

When it comes to airline travel, perhaps nothing has revolutionized the passenger experience more than airline apps. Indeed, they' re becoming so ubiquitous that more than 50 percent of U.S travelers have at least one airline app installed on their smart device, according to travel industry research firm Phocuswright.

Maybe that's because apps make travel easier, and often are more functional than a kiosk or even an airline's own website. Passengers report that they' re often more quickly informed of a flight cancellation or gate change than an airline employee. Not all airline apps are created equal, but in general you can use an app to check in for a flight, change seats, and request and pay for an upgrade. Road warriors in particular appreciate mobile boarding passes and the ability to track their flights. Many airlines now offer free onboard streaming entertainment via apps. The Delta Air Lines app even allows users to track their bags, from check-in to carousel, while the Air France app lets passengers download magazines and newspapers from the airline's library 30 hours prior to departure.

But what if you are traveling extensively on more than one airline? Global airline alliances have their own apps that allow you to view flights for all member airlines and their affiliates, including code share flights. In general, you can find flight schedules for all member airlines and track member airline flights. Airport information is available, as are details about local weather at the destination. Where's the nearest airport lounge? The app will locate it for you.

The Sky Team airline alliance app goes a step further by letting its SkyPriority members (Sky Team Elite Plus members and customers with first and business-class tickets) find out exactly which SkyPriority services-including priority check in and baggage drop off, as well as access to priority security lanes and boarding lanes-are available at individual airports.

You' ll find that some alliance app features are available through multiple channels of communication. For example, Sky Team members have formed their own online community by sharing traveler tricks and airport tips accessible through a variety of channels, including the app, Sky Team's website, Facebook page and a dedicated tips site. Sky Team's YouTube page features travel tips from regional celebrities.

Just as airlines seem to have conquered social media, another method of communicating with travelers has just arrived. KLM Royal Dutch Airlines is the first carrier to sign up for Facebook's Messenger chat app. KLM flyers can automatically receive itineraries, flight updates, check-in notifications, boarding passes and rebook flights and communicate with customer service, all from Facebook Messenger. Messenger for Business was launched so that customers-in this case, passengers-can transact business over the messaging app in a single communication thread. Roughly 80 percent of passengers on planes traveling within the U.S. have the Messenger app installed on their smartphones, according to Facebook.

Clearly, mobile apps and social media have transformed our digital lives. Airlines favor apps and other technologies because they get customers out of airport lines and off phone lines. Through their smart devices, travelers now have untethered access to travel information. A few quick taps can supply individuals with information never dreamed possible even a decade ago. And with more people using smartphones as their primary computing device, and as more people own cellphones globally, people expect technology-driven methods of communication and convenience to accelerate. Whether you' re high-tech or not, you must admit that having immediate access to the information you need sure beats getting a busy signal on a toll-free phone line.

Which of the following is closest in meaning to the underlined word “untethered” in the last paragraph？