调查基坑开挖范围内及影响范围内的各种管线的方法有()。A、向设计单位查询 B、向管线

阅读理解。

     Latest news: A Chinese military helicopter involved in relief operations (救助工作) crashed in heavy fog

near the town of Yingxiu on Saturday with 14 people on board, according to China's official news agency,

Xinhua, which provided no details about injury.

     Earthquake relief operations in Sichuan Province have been hampered (阻碍) in recent days by intermittent

heavy rains. Roads throughout the affected area have been destroyed by the May 12 earthquake which has

already caused nearly 70,000 people's death, requiring evacuations by air in some areas and the transportation

of heavy equipment to the disaster zone by large military helicopters.

     Using air-dropped equipment, military engineers are working around the clock to drain rivers that have been

dammed by landslides caused by the earthquake. The risk of a bursting barrier dam near the town of

Tangjiashan threateds millions of people who live downstream, and the authorities have been working feverishly

in recent days to evacuate (疏散) hundreds of thousands of residents of the river's watershed area even as

they try to prevent a flood.

     It was not clear from initial reports whether the crashed helicopter was involved in this operation. Xinhua

reported that the aircraft had encountered "strong air currents" prior to the accident.

1. Where is this passage most probably taken from?

A. Daily newspaper.

B. Textbook.

C. Advertisement.

D. Monthly magazine.

2. Where is this passage most probably taken from?

A. Daily newspaper.

B. Textbook.

C. Advertisement.

D. Monthly magazine.

3. What's the possible reason for the air crash according to China's official news agency?

 A. Air currents and heavy fog.

B. An earthquake and heavy fog.

C. Air currents and heavy rains.

D. Air currents and evacuations.

承德避暑山庄的面积是（）。

A.5200亩

B.4095亩

C.4350亩

D.8460亩

京剧《单刀会》、《群英会》、《华容道》，取材于以下哪部小说（）。

A、《西游记》

B、《水浒传》

C、《三国演义》

以下程序运行后的输出结果是______。
#include
char *ss(char *s)
char *p, t;
p=s+1; t=*s;
while(*p) *(p-1) = *p; p++;
*(p-1)=t;
return s;main()
char *p, str[10]="abcdefgh";
p = ss(str);
printf("%s\n",p);

当DME工作于跟踪状态时（）。

A.接收频率自动跟踪发射频率而变化

B.本振频率自动跟踪发射频率，以保持中频不变

C.脉冲重复频率自动跟踪距离而变化

D.距离计数器的输出是不断变化