听力原文: Many people hurt their backs when they try to lift heavy things from the floor. It is easy to hurt your back muscles when you try to pick up a heavy object. However, there is a correct way to lift things from the floor. If you pick up big or heavy objects correctly, you probably will not hurt your back.
To lift something from the floor correctly, first bend your knees and squat down. Keep your back straight. Do not bend over from your waist; keep your back and hips and waist in a line. If you bend over; the muscles in your lower back can become hurt very easily. If you keep your back and hips straight, the muscles are stronger, because they have much more support. The other muscles can then help the lower back muscles.
As you squat down, try to get as close to the object as possible. For example, if you are going to pick up a heavy box, squat down directly in front of it.
Maybe you will have to spread your knees and legs. Put one knee on each side of the box. Remember at all times to keep your back straight.
Put your hands under the object that is in front of you, between your knees.
To lift the object, you should stand up slowly. Use your leg muscles in order to stand up. In other words, lift with your legs, not with your back.
According to the woman, what happens to many people when they try to lift heavy things from the floor?
A.They may lose the back part.
B.They may strain their muscles.
C.They may find it easier to lift one by one.
D.They may call someone to give a helping hand.
第1题
肥厚梗阻型心肌病的表现
A.心衰时收缩期杂音较响,随心衰好转而减轻
B.有类似心绞痛发作,特征性杂音,猝死率高
C.有感冒病史,心律失常,心肌酶升高
D.两侧血压不对称,上腹部有血管杂音
E.发作后,心电图出现动态演变
第2题
肥厚梗阻型心肌病的表现
A.心衰时收缩期杂音较响,随心衰好转而减轻
B.有类似心绞痛发作,特征性杂音,猝死率高
C.有感冒病史,心律失常,心肌酶升高
D.两侧血压不对称,上腹部有血管杂音
E.发作后,心电图出现动态演变
第3题
A.心衰时收缩期杂音较响,随心衰好转而减轻
B.有类似心绞痛发作,特征性杂音,猝死率高
C.有感冒样病史,心律失常,心肌酶升高
D.二侧血压不对称,上腹部有胸骨杂音
E.发作后,心电图出现动态演变
肥厚梗阻型心肌病的表现
第4题
心肌炎的表现
A.心衰时收缩期杂音较响,随心衰好转而减轻
B.有类似心绞痛发作,特征性杂音,猝死率高
C.有感冒病史,心律失常,心肌酶升高
D.两侧血压不对称,上腹部有血管杂音
E.发作后,心电图出现动态演变
第5题
心肌炎的表现
A.心衰时收缩期杂音较响,随心衰好转而减轻
B.有类似心绞痛发作,特征性杂音,猝死率高
C.有感冒病史,心律失常,心肌酶升高
D.两侧血压不对称,上腹部有血管杂音
E.发作后,心电图出现动态演变
第6题
(题共用备选答案)
A.心力衰竭时收缩期杂音较响,随心力衰竭好转而减轻
B.有类似心绞痛发作,特征性杂音,猝死率高
C.有感冒病史,心律失常,心肌酶升高
D.两侧血压不对称,上腹部有血管杂音
E.发作后,心电图出现动态演变
肥厚梗阻型心肌病的表现
查看材料
第9题
A.心衰控制后,心杂音减弱
B.心衰控制后,心杂音增强
C.含服硝酸甘油后,心杂音增强
D.心尖区收缩期杂音
E.主动脉瓣区第二心音亢进
扩张型心肌病的特点是
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