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【多选题】
关于胸外心脏按压，下列说法哪些正确A.
按压部位为剑突上4～5cm处，即胸骨中下1/3交界处
B.
正确操作时，动脉压可达40～60mmHg
C.
按压幅度为使胸骨下陷6～8cm
D.
操作者两臂伸直，凭自身重力垂直向胸骨加压
E.
按压频率成人为80～100次/分，婴幼儿为100～120次/分
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【简答题】A．They can not find a good math teacher. B．They can not pass the examination. C．They can not meet the requirements. D．They can not catch up with the lessons.
【简答题】A．The fact that by the 12th century paper reached Europe. B．The invention of moveable type in Asia. C．The arrival of the moveable type from Asia to Europe. D．The method of printing in large quan...
【简答题】A．They can tell people apart by how they behave. B．They can type each other. C．They can tell good people from bad ones. D．They can recognize human faces.
【单选题】What’s the main reason for Americans to go out to eat?
A.
They can meet with many friends.
B.
They can have cheaper food there.
C.
They can save time by not cooking.
D.
They can avoid washing dishes after the meal.
【简答题】A．They can buzz in to kill. B．They can hear the dry plants' cries. C．They can imitate the plants' crying. D．They can attack healthy plants in dry, hot weather.
【单选题】What can they do in the kitchen? [ ]
A.
They can cook the meals.
B.
I can sweep the floor.
C.
They can clean the bedroom.
【单选题】What can robots do in unpleasant surroundings?
A.
They can take the lunch breaks.
B.
They can have the vocation.
C.
They can work 24 hours a day.
D.
They can go on strike.
【简答题】A．They can share it with others. B．They can buy things they want. C．They can save it. D．All-above mentioned.
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