已知三个连续整数的平方和是50，则这三个连续整数是______．

泡菜坛内有时会长一层白膜，这层白膜主要是由什么的繁殖造成的?[ ]

A．酵母菌

B．毛霉菌

C．乳酸菌

D．醋酸杆菌

诊断急性胰腺炎的主要根据(本题有4个正确答案)

A．临床表现

B．肝功能检查正常

C．B超发现胰腺肿大

D．血尿淀粉酶增高

E．WBC升高

How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in the US.

For some parents, the Internet can seem like a jungle, filled with danger for their children. But jungles contain wonders as well as danger. With good guides, some education, and a few precautions(预防 ), the wilds of the Internet can be safely navigated. “Kids have to be on-line. If we tell our kids they can’t be allowed to surf the Internet, we’re cutting them off from their future,” said an expert.

Most kids have started to use search engines. Many of them are great for finding tons of interesting Internet sites, and they can also locate places where you might not want your kids to go. There are search engines designed just for kids. A certain software contains only sites that have been selected as safe. The most popular way would be to use what is known as a “content screener”. But this can’t be wholly reliable(可靠 ), and the best thing parents can do is to talk to their kids and let them know what is OK or not OK to see or do on the Internet. Another way is that mum or dad is nearby when the child is surfing the Internet.

A few other tips:

—Do not put the PC in a child’s room but keep it in an area where mum or dad can keep an eye on things. That also makes the Internet more of a family activity.

—Ask your child what he or she has been doing and about any friends they make on-line.

―Tell your child not to give on-line strangers personal information, especially like address and phone number.

And tell your children never to talk to anyone they meet on-line over the phone, send them anything, accept anything from them or agree to meet with them unless you go along.

小题1:What is the best way to protect children from improper material?

A．To talk to the children and persuade them to tell right from wrong.

B．To be nearby when the children are surfing the Internet.

C．To fix a content screener on the computer.

D．To buy some search engines for children.小题2:Which of the following statements is true according to the passage?

A．Surfing the Internet is the best way of educating children.

B．Using a content screener is most reliable for keeping children from having ways to the Internet.

C．Searching engines can help children to select materials fit for them.

D．Children’s not having chances to go to the Internet may have effect on their progress.小题3:According to the passage, we can infer that ____.

A．softwares that are fit for children who want programming

B．the Internet contains a lot of harmful sites

C．the Internet will be protected by law

D．a child who is on-line is in danger小题4:What does the passage tell us most?

A．Education

B．Good guides

C．Precautions

D．Software

（）是专攻七绝的高手。

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