客房部在酒店中的地位和作用？

（Ⅰ）解关于x的不等式（lgx）²-lgx-2＞0；

（Ⅱ）若不等式（lgx）²-（2+m）lgx+m-1＞0对于|m|≤1恒成立，求x的取值范围．

下列关于保留价和起拍价的关系，表述正确的是( )。

A．保留价不同于起拍价

B．保留价同于起拍价

C．起拍价可以低于保留价

D．起拍价也可以高于保留价

E．起拍价可以等于保留价

阅读表达。阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上(请注意问题后的词数要求)。

     [1] Do you spend over an hour each day texting messages to your friends? Do you frequently ignore work,

study, and other activities to check your phone for messages? Are you anxious and restless if you are separated

from your mobile phone? Do you hardly ever use your phone to talk any more, and do your thumbs hurt from

texting too much?

     [2] If _____, then it is very possible that you are a textaholic. A textaholic can be defined as someone who

is addicted to sending and receiving messages. The main symptoms are a strong desire to text messages, which

takes precedence (优先) over everything else, and bad moods, low spirits and a lack of self-confidence if

messages fail to come in. The root of the problem, as with many addictions, is the desire to escape from

emotional difficulties such as stress, anxiety and relationship problems. Experts warn that text addiction is likely

to become the most common form of addiction in the future, especially among the young.

     [3] So what can you do if you think you may be a textaholic? The key is to get your life back in balance.

Make sure you resist the urge to answer every message you receive, and consider leaving your mobile phone

behind occasionally when you go out. Most importantly, make a point of spending quality time with friends and

family, and make time to re-learn the art of face-to-face conversation instead of conducting your relationships

by means of text messages. Not only will you save time and money, but you may also rediscover the pleasure

of true communication.

1. How does the author introduce the topic of the text? (no more than 5 words)

    ______________________________________________________________________________

2. Fill in the blank in Paragraph 2 with proper words. (no more than 8 words) 

    ______________________________________________________________________________

3. What emotional difficulties may be the causes of text addiction? (no more than 5 words) 

    ______________________________________________________________________________

4. What do experts say about text addiction? (no more than 14 words) 

    ______________________________________________________________________________

5. What is the main idea of Paragraph 3? (no more than 8 words) 

    ______________________________________________________________________________

计算RPN值时不需要以下哪个数值（）

A.严重度

B.探测度

C.发生度

D.危害度

管壁厚度为δ₁＝6mm，管壁的导热系数λ₁＝200kJ/（m·℃），内表面贴附厚度δ₂＝1mm的水垢，水垢导热系数λ₂＝4kJ/（m·℃），已知管壁外表温度t₁＝250℃，水垢内表温度t₂＝200℃，求总热阻和通过管壁的热流。