下列方法中不能减小着陆距离的是().A.减速 B.增升襟翼 C.着陆沟 D.全动平尾

题型:单项选择题

问题:

下列方法中不能减小着陆距离的是().

A.减速

B.增升襟翼

C.着陆沟

D.全动平尾

考点:民用航空器维修执照考试飞机机体结构修理飞机机体结构修理题库
题型:单项选择题

Questions 61-70 are based on the following passage.


While some international couriers are showing signs of exhaustion, EMS (Express Mail Service), the generic name for the courier services of post offices, seems to be finding its stride. Known as Datapost in Britain, as Chronopost in France, and as A1-Barid al-Mumtaz in Saudi Arabia, EMS is now second in the international courier business (jointly with TNT Skypack). Last year it delivered 5.6 million items, weighing less than 20 kilograms each, across borders. That and its annual growth rate of around 5 percent have worried DHL, the market leader, enough for it to counter-attack in the Courts.
On October 26, a Dutch judge ruled against DHL on all three counts filed against the Dutch post office: that the three-initial name was too close to DHL’s; that the orange lines in the EMS logo were too similar to DHL’s dark red ones; and that the claim to the widest route system in the world was unfounded. DHL has threatened the Swiss post office with similar action, but it may reconsider after the Dutch ruling.
EMS has some advantages over the private couriers. One is a dense ready-made network of offices, especially in Europe, the avowed target area of the private couriers. Another advantage is a long tradition of working with customs authorities. In a business where minutes count, it pays to have good friends at customs. That advantage particularly irritates the private couriers because there is no legal way to combat such unquantifiable coziness.
The private courier services are also annoyed because in countries like Switzerland and Italy, where the post office is officially a monopoly, they pay it a fee. In Switzerland DHL says it pays more than SFr lm ($ 708,000) "to the competition" each year. In France the couriers have won a battle for exoneration.
Although governments are under little pressure to keep prices artificially low, EMS is often cheaper than the private couriers, but not always. A recent test in Britain (on a domestic route) showed Datapost about halfway between the least and the most expensive, but gave it full marks for speed and service.
Each national EMS is free to set its rates and follow its own rules on things like bulk discounts. The Universal Postal Union, based in Berne, determines how costs and revenues are split between sending and receiving countries, and standardizes procedures. More than 100 postal administrations have linked into the system—and more are coming, including Russia’s. That makes the feisty EMS particularly happy since its rivals have not been allowed to serve anywhere in Russia.

The word "stride" underlined in Paragraph 1 means ______.

A. advance
B. pride
C. position

D. route

题型:单项选择题

患者赵某,女性,37岁。1980年10月4日初诊。主诉:右胁疼痛反复发作近2年,加重3个月。患者发病的2年前,因工作原因与同事争吵后出现右胁胀痛,且逐渐加重,喜太息,不思饮食,经肝功能及胃肠等有关检查均无异常发现,服中、西药后症状缓解。后疼痛反复发作。3个月前出现针刺样疼痛,时轻时重。昨晚疼痛又作,特来门诊求治。饮食一般,二便正常,无发热,时有太息。检查:舌质微紫黯、苔薄白,脉沉细涩。现右胁刺痛难忍,有时引及右背,拒按,面部有淡黑色斑块沉着。

其诊断是()

A.腹痛

B.胁痛

C.臌胀

D.积聚

E.真心痛

题型:单项选择题

一般基本控制器包含()个功能块,每个功能块可以完成28种不同的功能(算法)。

A.4

B.8

C.18

D.28

题型:单项选择题

最容易被诱导免疫耐受的细胞是

A.B细胞
B.巨噬细胞
C.单核细胞
D.T细胞
E.NK细胞

题型:单项选择题

康体项目有哪些特点?并请举例说明。

更多题库