胸外心脏挤压的注意事项有哪些？

阅读理解。

     Besides entertainment and beautiful lanterns, another important part of the Lantern Festival , or

Yuanxiao Festival is eating small dumpling balls made of glutinous rice flour. We call these balls Yuanxiao

or Tangyuan. Obviously, they get the name from the festival itself. It is said that the custom of eating

Yuanxiao originated during the Eastern Jin Dynasty in the fourth century, then became popular during the

Tang and Song periods.

     The fillings inside the dumplings or Yuansiao are either sweet or salty. Sweet fillings are made of sugar, Walnuts, sesame (芝麻), osmanthus flowers (桂花), rose petals, sweetened tangerine (橘子)peel, bean

paste, or jujube paste (枣子酱). A single ingredient or any combination can be used as the filling . The

salty variety is filled with minced meat (肉末儿), vegetables or a mixture.

     The way to make Yuanxiao also varies between northern and southern China. The usual method

followed in southern provinces is to shape the dough of rice flour into balls, make a hole, insert the filling,

then close the hole and smooth out the dumpling by rolling it between your hands. In North China, sweet

or nutmeat stuffing is the usual ingredient. The fillings are pressed into hardened cores, dipped lightly in

water and rolled in a flat basket containing dry glutinous rice flour. A layer of the flour sticks to the filling,

which is then again dipped in water and rolled a second time in the rice flour. And so it goes, like rolling a

snowball, until the dumpling is the desired size.

     The custom of eating Yuanxiao dumplings remains. This tradition encourages both old and new stores

to promote their Yuanxiao products. They all try their best to improve the taste and quality of the dumplings to attract more customers.

1. Which of the following is NOT true? 

A. The custom of eating Yuanxiao dates back to the fourth century.

B. Sugar, rose petals and minced meat are all fillings of Yuanxiao.

C. Sweet Yuanxiao are usually made in southern China.

D. People in northern China usually make Yuanxiao by rolling like a snowball.

2. Which country does the Lantern Festival come from?

A. China     

B. South Korea    

C. Jin Dynasty      

D. Tang and Song periods.

3. Choose the right order of making Tangyuan in southern provinces.

  ① make a hole and insert the filling  

  ② roll the dough between your hands  

  ③ shape the dough of rice flour into balls  

  ④ close the hole  

  ⑤ prepare some rice flour

A. ⑤③②①④  

B. ③⑤①②④  

C. ③①④②⑤  

D. ⑤③①④②

属于《合同法》规定可以变更或撤销的合同为( )。

A．一方以欺诈、胁迫的手段订立合同，损害国家利益的
B．以合法形式掩盖非法目的的
C．因重大误解订立的
D．损害社会公共利益的

根据体格检查确定病变节段为

A．颈5～6

B．颈6～7

C．颈7～胸1

D．臂丛神经

E．大脑

采用矿渣水泥拌制的大体积混凝土的浇水养护时间不得少于（）日。

A.7

B.14

C.15

D.21

水喷雾灭火系统工作原理是什么？