在深度为7的满二叉树中,度为2的结点个数为()。

题型:填空题

问题:

在深度为7的满二叉树中,度为2的结点个数为()。

考点:计算机等级考试VISUALFOXPRO2007年4月计算机二级(VF)全真试卷
题型:填空题

电梯在直驶状态下,可以应答厅外顺向召唤信号。()

题型:填空题

Earthquakes happen without warning(前兆). They can happen any time of a day, at any point during the year. When an earthquake is happening, you should know what you should do or not do.

Do NOT go outside. You could get injured from falling glass or parts of buildings. If you are outside, stay away from buildings and power lines(输电线).

Stay under a desk, table, or other strong furniture. Hold on to it. Or stay in a corner of the building. Cover your face and head with your arms and cover your mouth with a towel or clothing. Stay inside until shaking stops and it is safe to go outside.

Keep away from windows, pictures or advertisements on the wall or the building, and anything else that could fall and hurt you. Most people get injured by falling things during an earthquake, not by the shaking itself.

Also keep away from a fire. You could fall down and burn yourself on the fire.

If you are driving when an earthquake happens,stop the car if it’s safe. Stay inside your car until the earthquake stops, and don’t drive near bridges. Try not to stop by power lines or trees. These could fall and hurt you.

小题1:It isn’t safe for you to ______ while the earthquake is happening.

A.run out of the building

B.stay in a corner of the building

C.cover your head with your arms

D.cover your mouth with a towel小题2:From this passage, we know ______ .

A.all people are frightened at earthquakes

B.earthquakes may happen at any time

C.we can’t save ourselves in an earthquake

D.people won’t get injured in an earthquakes if they are careful enough.小题3:The best title for this passage should be “ _____________ ”

A.How Earthquakes Happen

B.How to Drive a Car

C.What We Should Do in Earthquakes

D.Why Earthquakes Happen

题型:填空题

关于受精卵植入的描述哪项是不恰当的()

A.植入发生后滋养层细胞形成细胞滋养层和合体滋养层

B.植入可以在子宫体、底和子宫颈

C.植入发生在受精后的笫6~7天

D.植入后的子宫内膜称为蜕膜

E.植入的条件之一是胚体与子宫内膜发育同步

题型:填空题

大怒可以导致的是()

A.气结

B.气滞

C.气上

D.气下

E.气散

题型:填空题

Personal firewall is a technology that helps______intruders from accessing data on your PCvia the Internet or another network, by keeping______data from entering or exiting your system.
Hackers do not just target national security organizations for______: They want your taxreturns, network passwords, or bank account numbers. And you do not want the FBI kicking in yourdoor because someone hijacked your PC to______in the latest denial-of-service attack on theInternet. Now that "always-on" broadband connections such as cable modems and digital subscriberline are becoming more popular, home users are at risk. Fortunately, you can protect your data.Firewalls can block______ attacks and protect your PC from outside threats.

A.enlist

B.go to

C.participate

D.attach

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