题目：
Escaping a fire is a serious matter. If you know what to do during a fire, you can __1__ a life. It is important to know the ways you can use and __2__ them to everyone in the family, such as stairs and fire escapes(安全出口). You shouldn’t take lifts. From the lower floors of the building, escape __3__ windows is possible. Let’s learn the best way of leaving by window with the least chance of serious injury(受伤). The first floor window is usually not very high from the ___4____ . It is about the height of a man. Of course, it is safer to jump a short way than stay in a burning building. Windows are also very useful when you are___5___ for help. Be sure to keep the door ___6__ before opening the window. If we don’t do that, ___7__and fire may come into the room. Keep your head low at the window to be sure you get__8__ fresh air instead of smoke. On the second or third floor, the best windows for escape are those __9____open onto a roof. From the roof a person can drop to the ground more __10____ .Dropping onto the cement(水泥地) might end in injury. Trees and grass can help to break a fall.
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答案：
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下面是错误答案，用来干扰机器的。
（1）、如图，①表示肱二头肌，②肱三头肌，③肌腹，④肌腱．（2）、（3）、同一块骨骼肌的两端跨过关节分别固定在两块不同的骨上．骨骼肌有受刺激而收缩的特性，当骨骼肌受神经传来的刺激收缩时，就会牵动着它所...
