混凝土坝检查观测的基本步骤有哪些？

患儿，男，3岁，曾多次患肺炎，平时无发绀。查体：心前区隆起，心尖搏动弥散，胸骨左缘第2肋间闻及4/6级粗糙的连续性机器样杂音。

可能存在的血流动力学改变是（）

A.体循环血流量增加

B.肺循环血流量增加

C.肺循环血流量减少

D.右向左分流

E.左心室舒张期容量减少

会计工作具有时效性、程序性、制约性和责任性。( )

Raising pets is not a new thing in China , but recently it has taken on a new meaning .

As a famous Chinese saying goes, pursuit of petty (小的，不重要的) pleasures weakens one’s will to make progress . The saying has been so popular that even today many people still consider raising pets as a hobby of the idle .

Things have changed much recently and now raising pets has become a popular pastime , resulting in a successful pet care industry .

Pet food is sold in almost all supermarkets and many special stores for pet needs have been set up .

Animal hospitals provide various medical services for sick dogs and cats , and pet exchange fairs are held regularly .

At the China International Pet Show which took place recently in Beijing , more than 100 factories from across the country exhibited their products . Thousands of dealers and pet owners went to the show.

“People’s swollen pockets make it possible for many to raise pets , a hobby that used to be enjoyed only by the wealthy ,” said Wang Wei , who works with the National Kennel Association of China .

Wang Yuyan , vice president of the Small Animals Protection Association , agreed , “ In many films and novels , having a pet is used as a symbol of wealth . That’s not a complete picture . ” Wang added that pets are friends in a real sense of the word , not just playthings . “ Anyone with a loving nature can raise pets . ”

Still the high cost of keeping a pet is something many people have to think about .

“I like dogs and cats , but I have neither time nor money to raise them , ”said Li Jun , in her 40’s , a civil servant from Beijing .

The cost of raising a dog is high in Beijing , where registration (登记) is a must for all dogs and costs 5,000 yuan for each animal . In addition , pet owners must pay for regular injection of vaccines (疫苗). Most of all , dog food is quite expensive .

Unlike his mother , Li Jun’s 10-year-old son, Li Qiyu, dreams of the day he will have his own pet . “I hope I can have a dog in my house , ” he said .

小题1:Things have changed much recently , because ___________ .

A．people have all become kind-hearted

B．small animals have no places to live in

C．people’s living conditions are improving

D．more and more people are out of work小题2: In big cities in China today , raising pets ________ .

A．has changed people’s life

B．has destroyed some families

C．has met much difficulty

D．has brought much business for some people小题3:According to Wang Yuyan’s opinion , raising pets _________ .

A．is a necessary job for us all

B．is harmless for most people

C．should be a hobby of the rich

D．will make the poor happy

Vdaf符号的表示意义是（）。

A、挥发份

B、分析基挥发份

C、可燃基挥发份

在建设工程进度调整的系统过程中，当分析进度偏差产生的原因之后，首先需要( )。

A．确定后续工作和总工期的限制条件
B．采取措施调整进度计划
C．实施调整后的进度计划
D．分析进度偏差对后续工作和总工期的影响