有如下程序: #include<iostream> using namespac

题型:单项选择题

问题:

有如下程序: #include<iostream> using namespace std; class C1{ public: ~Cl( ){cout<<1;} }; class C2:public C1{ public: ~C2( ){cout<<2;} }; int main( ){ C2 cb2; C1*cb1: return 0; } 程序的输出结果是

A.121

B.21

C.211

D.12

考点:计算机等级考试C++二级C++笔试
题型:单项选择题

下列哪项不是常见的病因

A.细菌病毒
B.食物,如鱼、牛奶
C.某些药物
D.寒冷因素
E.放射性物质

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How to be Prepared

Electricity, water, gas and telephone may not be working after an earthquake. The police and fire department are likely to be tied up. You should be prepared to take care of yourself for at least three days, preferably for a week.

This list can also be applied to other disasters, such as floods or wildfires.

1. food and water (a gallon a day per person)

2. a first aid kit

3. a fire extinguisher suitable for all types of fires

4. flashlights, a portable radio extra batteries

5. blankets, clothes, shoes and money (ATMs may not work)

6. baby and pet food

It’s also a good idea to decide beforehand how and where your family will reunite if separated during a quake and to conduct in-home practice drills.

During an Earthquake

If you are indoors, stay there. Get under and hold onto a desk or table, or stand against an interior wall. Stay away from exterior walls, glass, heavy furniture, and stay away from windows and outside walls and do not use the elevator.

If you are outside, get into the open, stay into the open, stay away from buildings, power lines or anything else that could fall on you.

If you are driving, move the car out of traffic and stop, avoid parking under or on bridges or overpasses, Try to get clear of trees, light posts, signs and power lines.

If you are in a crowded public place, avoid panicking and do not rush for the exit. Stay low and cover your head and neck with your hands and arms.

After an Earthquake

If the phone is working, only use it in case of emergency. Likewise, avoid driving if possible to keep the streets clear for emergency vehicles.

Be aware that items may fall out of cupboards or closets when the door is opened, and also that chimneys can be weakened and fall with touch. Check for cracks and damage to the roof and foundation of your home.

Listen to the radio for important information and instructions. Remember that aftershocks, sometimes large enough to cause damage in their own right, generally follow large quakes.

If you leave home, leave a message telling friends and family your location.

小题1:Which of the following items is unnecessary to prepare before an earthquake?

A.Batteries

B.Cash

C.Medicine

D.Creditcard小题2:When an earthquake comes,you should ______. 

A.hideyourselfinthekitchen

B.rushfortheexitimmediately

C.stayawayfromheavyobjects

D.callthepolicerightaway小题3:When an earthquake is over,you should______. 

A.driveacartotakeyourfamilytothesafeplace

B.checkthesecurityofyourhome

C.callyourrelativestotellthemyouaresafe

D.clearupthemessassoonaspossible.小题4:Which of the following sentences is true according to the passage? 

A.You’dbettermakeitclearhowandwhereyourfamilywillreuniteifseparatedduringaquakeafterthequakehappens.

B.Ifyouareindoors,getintotheopen.

C.Ifyouareinacrowdedpublicplace,avoidpanickinganddorushfortheexit.

D.Ifthephonestillworks,onlyuseitwhennecessary.小题5:What does the underlined word “aftershock ” mean? 

A.Alessseriousquakefollowingalargeearthquakeinthesamearea.

B.Afurtherreactionfollowingtheshockofadeeplydisturbingthing.

C.Amessonehastodealwithafteraterriblething.

D.Aninstructionthegovernmentgivestosolveproblems.

题型:单项选择题

某热水网路各用户的流量均为100m3/h,热网在正常时的水压图如下图所示,如水泵扬程保持不变,试求同时关闭用户1和2后,用户3、4的流量各为多少()。

A.用户3为250~260m3/h,用户4为100m3/h

B.均为110~120m3/h

C.均为250~260m3/h

D.均为100m3/h

题型:单项选择题

行为人在交通肇事后为逃避法律追究,将被害人带离事故现场后隐藏或者遗弃,致使被害人无法得到救助而死亡或者严重残疾的,应当依照《刑法》的规定,以故意杀人罪或者故意伤害罪定罪处罚。

题型:单项选择题

滑移顶梁支架由()、后顶梁及3-4根液压支柱以及移架千斤顶等部件组成。

A.前顶梁

B.前探梁

C.前柱

D.中柱

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