完形填空

    Things can become very dangerous in a fire. 1 will you do if you cannot get out of the room?

    If you cannot get out of the room, close the door and put blankets (毛毯) at the 2 of the door. They can 3 the smoke from coming in.

    And 4 119 for help. Then open the window and 5 for help. Wave (摇摆) a piece of cloth from the window. Let people know that you are still inside the room.

    Don't stay under the bed or in the wardrobe. When the firefighters come in, they will have to 6 you. So stay by the window.

    If your clothes 7 fire, remember the words: stop, drop and roll.

    Stop running. Moving around will make the fire even 8. Drop and lie down on the floor. Roll around, from one side to 9 to stop the fire.

    If your friend's clothes are on fire, don't let him or her 10. Shout, "Stop, drop and roll!" When he or she is rolling on the floor, you can use a blanket or other heavy cloth to help to put out the fire on his or her clothes.

为了探究力的作用效果与哪些因素有关，一同学将钢锯条一端固定在支架上，做了如图所示实验，其中F₁=F₂=F₄>F₃。由甲、乙、丙、丁四图中钢锯条形状变化的比较，你能分析得出结论是____。

人体肱三头肌受到刺激以后能收缩，它所受的刺激来自（    ）

如图所示，常温下两个烧杯，分别盛有冰块和热水，上方均盖有一块玻璃片分别为a、b，过一会儿可明显看到    (     )

    ①盼望着，盼望着，东风来了，春天的脚步近了。

    ②一切都像刚睡醒的样子，欣欣然张开了眼。山朗润起来了，水涨起来了，太阳的脸红起来了。

    ③小草偷偷地从土里钻出来，嫩嫩的，绿绿的。园子里，田野里，瞧去，一大片一大片满是的，坐着，躺着，打两个滚，踢几脚球，赛几趟跑，捉几回迷藏。风轻悄悄的，草软绵绵的。

    ④桃树、杏树、梨树，你不让我，我不让你，都开满了花赶趟儿。红的像火，粉的像霞，白的像雪。花里带着甜味儿；闭了眼，树上仿佛已经满是桃儿、杏儿、梨儿。花下成千成百的蜜蜂嗡嗡地闹着，大小的蝴蝶飞来飞去，野花遍地是：杂样儿，有名字的，没名字的，散在草丛里像眼睛，像星星，还眨呀眨的。