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【简答题】
阅读理解。 Jeremy Wirick, 9, has been back in school for less than two months, but he has already had several asthm a(哮喘)attacks. A recent attack happened on October 2, after he pushed himself too hard in physica l exercise. Running, power walking, jogging and push-ups took their toll. When Jeremy got home an hour or two later, he was out of breath. He needed to use a nebulizer (喷雾器), a machine that helps send medicine quickly to the lungs, to get his breathing back to normal. Asthma attacks like Jeremy increase in September and October. More than six times as many asthma sufferers who are primary-school age need hospital treatment in the fall as in the summer. Experts believe many factors can cause back-to-school asthma. Kids get together in close spaces, they start passing viruses around. A viral infection (感染) can cause an asthma attack. There are also certain fall allergies (过敏症) that can cause attacks. Exercise is another common cause of an attack. Besides, the stress of school can make asthma worse. Parents can play a big role in helping kids with asthma start the school year right. Dawne Gee's 10-year-old son, Alexander, has had asthma since he was a baby. Before the school year starts, she tells school workers in writing about her son's asthma. The Gees live in Kentucky, which has passed laws allowing students to carry their asthma medication (药物治疗)with them at school. Alexander's mom makes sure he has his inhaler (人工呼吸器) with him when he goes to school and that he keeps it on hand at all times. In Delaware, where Jeremy lives, kids are allowed to carry their inhalers at school. The American Lung Association says that about 6.2 million American children suffer from asthma. Asthma is the chronic (慢性) illness that causes students to miss the most days of school. There are many things that schools can do to help students control their asthma 1. The passage mainly deals with _______. A. how to prevent and treat Asthma B. what Asthma is and its medication C. the side-effects Asthma has on kids D. the causes of Asthma and how to control it at school 2. By saying'Running, power walking, jogging and push-ups took their toll.', the writer means that_____. A. physical exercise affected their health B. physical exercise gave them a deep thought C. asthma attacks made them like physical exercise D. asthma attacks could be cured through physical exercise 3. Which of the following statements is NOT supported by the passage? A. Kids are likely to suffer asthma attacks in the fall B. Stress can add to the risk of asthma attacks C. Medication can cure asthma quickly D. Asthma attacks will need necessary medical treatment 4. The passage lists many factors that cause asthma attacks except_____. A. A viral infection B. unhealthy habits C. certain fall allergies D. physical exercise 5. The following paragraph is probably going to talk about______. A. tips on asthma for schools B. a survey on students with asthma C. the effects asthma has on students D. further understanding of Asthma
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【单选题】关于顺序变量下面说法不正确的是( )。
A.
职工的学历属于顺序变量
B.
学生对食堂的满意水平属于顺序变量
C.
学生的专业属于顺序变量
D.
产品的质量等级属于顺序变量
【简答题】In the express of CPP(critical packing parameter), CPP=v/a 0 l c , what the V, a 0 , l c stand for?
【单选题】如图所示OA杆绕O轴朝逆时针向转动,匀质圆盘沿OA杆滚动而无滑动。已知圆盘的质量m=20kg,半径R=10cm。在图示位置时,OA杆的倾角为30°,其转动的角速度ω1=1rad/s,圆盘相对OA杆转动的角速度ω2=4rad/s, ,则此时圆盘的动量大小为( )。
A.
K=4N·S
B.
C.
D.
K=8N·S
【单选题】在一定浓度的CO 2 和适宜温度条件下 ,测定不同光照强度下放有某双子叶植物叶片的密闭装置中CO 2 的变化量,结果如下表。分析表中数据,不正确的推论是 [     ]
A.
光照强度为1klx时,光合作用吸收的CO 2 少于呼吸作用释放的CO 2
B.
光照强度为2klx时,该植物净光合作用速度为0
C.
光照强度由5klx增强为7klx时,叶肉细胞中C 3 化合物合成速率增大
D.
光照强度为9klx时,叶绿体中色素的含量是限制植物光合作用速率的内因之一
【单选题】在一定的 CO 2 浓度和适宜的温度下,测得不同光照强度下的番茄叶片光合作用强度,结果如图。据图分析正确的是
A.
A 点产生 ATP 的场所只有线粒体
B.
番茄正常生长所需的光照强度应大于 B 点
C.
C 点时真正的光合速率约为 15mg CO 2 /2500px 2 叶 · 小时
D.
C 点后限制光合作用强度的因素是温度和 CO 2 浓度
【单选题】在一定浓度的CO 2 和适宜温度条件下,测定不同光照强度下放有某双子叶植物叶片的密闭装置中CO 2 的变化量,结果如下表。分析表中数据,不正确的推论是 [     ]
A.
光照强度为1klx时,光合作用吸收的CO 2 少于呼吸作用释放的CO 2
B.
光照强度为2klx时,该植物净光合作用速率应为0
C.
光照强度由5klx增强为7klx时,叶肉细胞中C 3 化合物合成速率增大
D.
光照强度为9klx时,叶绿体中色素的含量是限制植物光合作用速率的内因
【单选题】在一定浓度的CO 2 和适宜温度条件下。测定不同光照条件下放有某双子叶植物叶片的密闭装置中CO 2 的变化量,结果如下表。分析表中数据,不正确的推论是 [     ]
A.
光照强度为1klx时,光合作用吸收的CO 2 少于呼吸作用释放的CO 2
B.
光照强度为2klx时,该植物光合作用速率为0
C.
光照强度由5klx增强为7klx时,叶肉细胞中C 3 化合物合成速率增大
D.
光照强度为9klx时,叶绿体中色素的含量是限制植物光合作用速率的内因之一
【判断题】彝族的时间历法是一年十个月,每月三十六天。
A.
正确
B.
错误
【单选题】在一定浓度的CO 2 和适宜温度条件下,测定不同光照条件下放有某双子叶植物叶片的密闭装置中CO 2 的变化量,结果如下表。分析表中数据,不正确的推论是 [     ]
A.
光照强度为1.0klx时,光合作用吸收的CO 2 少于呼吸作用释放的CO 2
B.
光照强度为2.0klx时,该植物光合作用速率为0
C.
光照强度由5.0klx增强到7.0klx时,叶肉细胞中C 3 的合成速率增大
D.
光照强度为9.0klx时,叶绿体中色素的含量是限制植物光合作用速率的内因
【单选题】将某植株的一个叶片置于密闭小室内,调节小室CO 2 浓度,在适宜温度和一定光照强度下测定叶片光合作用的强度(以CO 2 吸收速率表示),测定结果如下图。下列相关叙述,正确的是 [     ]
A.
如果光照强度适当降低,a点左移,b点左移
B.
如果适当降低温度,a点左移,b点左移
C.
如果光照强度适当增强,a点右移,b点右移
D.
如果适当升高温度,a点左移,b点右移
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