第1题:
Stressful environments lead to unhealthy behaviors such as poor eating habits, which ________ increase the risk of heart disease.
[A] in turn
[B] in return
[C] by chance
[D] by turns
第2题:
From the text we know that some of consumers' habits are developed due to( )
[A] perfected art of products
[B] automatic behavior. creation
[C] commercial promotions
[D] scientific experiments
第3题:
A. became
B. have become
C. had become
D. has become
第4题:
第5题:
第6题:
A
If you go to a fast food restaurant.you will probably see a lot of teenagers. Today,many teenagers are overweight,and some of.this is because of their bad eating habits., Most teenagers love food with a lot of fat,oil,salt,and sugar. People often call this kind of food "junk food".
But. bad eating habits go beyond fast food. We find many teenagers eat unhealthily. Some don't have breakfast before they go to school. During the day,some don't have a proper meal for lunch. In a recent survey at one school,scientists found that over two-thirds of the students didn't follow a healthy diet. They didn't like vegetables,and many of them didn't like to eat fruits. They preferred to eat food with a lot of salt,sugar,or fat.
Parents today also worry about their children's diet. Some doctors give the .following ad-vice :
★Teenagers shouldn't eat too much junk food.
★ Teenagers shouldn’t eat food with too much salt. Salt can cause high blood pressure(高血压) in the future.
★Teenagers should eat food with less fat,oil,and sugar.
★Teenagers need to eat some fruits and vegetables every day: Fruits and vegetables arerich in vitamins(维生素 ) and have little fat.
★Teenagers need to drink more milk. Milk will help their bones grow.
★Teenagers need to eat breakfast every day. This is good for their body and mind.
( )21."Junk food" contains(包含) a lot of ________.
A. milk and sugar
B. fruits and sugar
C. vegetables and salt
D. fat,oil,salt and sugar
第7题:
【A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of different names, including packet voice, voice over packet, voice over the internet, internet telephone, and Voice over Ip(Voip). But it appears the industry has settled on the term”Voice ove IP” in reference to the internet protocol, which controls the transfer of data over the internet. There are currently three ways to deliver VoIp to users, the first technique is found at the corporate level. Many companies are offering VoIP systerms that operate over a local area network. These systems involve a fair amount of equipment, such as VoIP servers, special IP-enabled telephones, and routers that can direct telephone calls. Today a large portion of corporate sites have converted their older internal telephone systems to VoIP systems that opreate over a LAN, thus converging two systems into one. A second common solution is the one often encountered at home. Using existing telephones, a special converter is added between the telephone and a high speed internet(DSL or cable modem)connection. The converter digitizes the voice signal and creates a stream of packets that are then sent over an ip connection.The third technique involves smart cell phones. Never cell technologies are all packet-based, thus requiring a telephone call to be converted to digital packets and sending those packets over IP networks.】
From the paragraph above,a popular service that has attracetd the interest of companies and home users,is termed as () . The data transfer over the Internet is controlled by the () . At corporate level, many companies have replaced their older internal telephone systerms with () that oprerate over a local area network.
A、voice over the internet B、voice over packet C、Voice over IP D、internet telephony A、packet B、internet protocol C、industry D、VoIp servers A、VoIP systems B、IP-enablde telephones C、VoIP servers D、routers
第8题:
此题为判断题(对,错)。
第9题:
第10题: