A. Have him or her lie with feet lifted a little.

B. Wash the bite area with soap and water.

C. Pinch (捏) the lower part of the nose for at least 10 minutes.

D. Use an ice pack（袋）.

E. Clean the person's face with a cool cloth.

    What should we do if one of our classmates suddenly falls ill or gets hurt? Here are some steps you should follow. But always remember to look for medical care after first aid(急救)if the wound is serious.

    Broken bones(骨头): Take away clothing from the wound____ Don't move the hurt body part while waiting for the doctor to arrive.

    Animal bites(咬伤):____Pack （拧紧）the wound with a clean cloth if it is bleeding（出血）. If the bleeding has stopped, cover the area with a bandage and take the person to the hospital. Make sure you remember what kind of animal it is so the doctor can find the right way to treat him or her at once.

    Fainting(昏厥):____ Don't move the body if you think there might be wounds from the fall. Make sure he or she can breathe and let in fresh air.____

Nosebleeds(流鼻血): Have the person sit up with his or her head tilted(倾斜)forward a little. Do not have the person tilt his or her head back because this may cause heavy breathing or coughing.____

实验室制取某些气体所需的装置如图所示，请回答下列问题：

（1）实验仪器①的名称是____ ．

（2）实验室制取二氧化碳气体应选择的发生装置是____ 　（填选项字母），反应的化学方程式为____ ．

（3）选择收集气体方法时，必须考虑的气体性质有　____ （填序号）．

①颜色   ②密度   ③溶解性   ④可燃性

（4）若用装置E排水收集氧气，瓶内先装满水，气体从____ 　（填“a”或“b”）导管通入瓶内；若用装置E除去氧气中混有水蒸气，瓶中应盛放下列哪种试剂____ （填写选项编号）．

A、浓硫酸    B、稀硫酸   C、稀盐酸   D、石灰水

（5）若要收集较为纯净的氧气最好选用____ 　装置（填选项字母）．若选A装置作为用高锰酸钾制取氧气的发生装置，还须补充的一种用品是____ ．

在妈妈的精心呵护下，婷婷从一个受精卵发育成青春美少女（如图），其中说法正确的是（    ）