已知某线声源长10km,在距线声源10m处测得噪声级为90dB,则30m处得噪声值为

题型:单项选择题

问题:

已知某线声源长10km,在距线声源10m处测得噪声级为90dB,则30m处得噪声值为()dB。

A.78

B.81

C.80.5

D.85.2

考点:环境科学技术及资源科学技术环境噪声控制工程环境噪声控制工程题库
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把下列的词语补充完整。

   寸(       )尺(      )  (      )心壮(     )   (      )沙(      )塔

   半(       )而(      )  (      )之以(     )   ( )始( )终

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The 2012 Olympics will open in London on July 27, 2012.

London will become the w___67____ first city to host the Olympics  three times, in 1908, in 1948 and in 2012.

As is known to all, London is a garden city. When you step into the city, you will find yourself deeply a_____68______by the beautiful views around.

Also, there are p  69  of nice stadiums and gymnasiums for Olympic Games, such as the swimming pools, football playground and basketball gyms. The building of the new stadiums has been completed. London is r  70  for the “greatest show on earth”.

The All-England club, the site of Wimbledon, will host tennis. Wembley Stadium will be used for football w  71  Lord’s cricket(板球)ground will host archery(剑术). London wants to show their historic sites and a few new-classics to the world this summer.

Mascots(吉祥物) of the London Olympic Games are Wenlock and Mandeville. They have frightened some people and cheered others u  72  . Wenlock is the name of the English village considered by many to be the birthplace of the m  73 Olympics. The other mascot’s name means the village of Stoke Mandeville, where the Paralympic(残奥会) movement began.The motto(口号)for the London Olympics has been d  74  as “Inspire a generation”.(激励一代人)

The organization welcomes the athletes from all o    75    the world to the UK to perform at their very best and inspire the world. International Olympic Committee (IOC) president Jacques Rogge said he was c  76  London would meet the expectations of the world.

题型:单项选择题

患儿,3岁。近日因外感而出现发热、气粗、咳嗽、烦躁、汗出,经治三天,病情日重。诊见:体温40.2℃,四肢抽搐,牙关紧闭,角弓反张,时惊啼叫,唇红,舌红,苔黄干,指纹紫。其证候是()。

A.风热动风

B.惊恐惊风

C.气营两燔

D.邪陷心肝

E.湿热疫毒

题型:单项选择题

有以下程序
#include"iostream.h"
void main( )

int i=1,j=1,k=2;
if((j++||k++)&&i++)
cout<<i<<","<<j<<","<<k;
cout<<endl;

执行后输出结果是

A.1,1,2

B.2,2,l

C.2,2,2

D.2,2,3

题型:单项选择题

计算机数据处理技术经历了人工管理、文件系统、数据库系统和______个阶段。

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