()包括了许多领域的研究,它是研究无机自然界和包括人的生物属性在内的有机自然界的各门

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()包括了许多领域的研究,它是研究无机自然界和包括人的生物属性在内的有机自然界的各门科学的总称。它的根本目的在于寻找自然现象的来因。

A.哲学

B.自然科学

C.社会科学

D.其它

考点:科研方法与论文写作科研方法与论文写作题库
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1岁小儿,发热3天,咳嗽,有痰不易咳出,一般状态好,双肺散在湿啰音,白细胞总数及中性增多,X线胸片:两下肺散在斑片影,最可能的诊断是()

A.急性支气管炎

B.急性喉炎

C.支气管肺炎

D.毛细支气管炎

E.支气管哮喘

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下列细菌性食物中毒中潜伏期最短的是()

A.副溶血性弧菌食物中毒

B.肉毒梭菌食物中毒

C.沙门菌食物中毒

D.葡萄球菌肠毒素食物中毒

E.变形杆菌食物中毒

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Fire fighting is a serous matter, knowing what to do during a fire can save people’s lives. It is important to know the ways you can use and show them to everyone else in the family, such as stairways and emergency exits, but not elevators.
From the lower floors of building, escape through windows is possible. Learn the best way to get out from a window with the least chance of serious injury.
The second floor window is usually not very high from the ground. An average person, hanging by the fingertips will have a drop of about 6 feet to the ground. It is about twice the height of an average man. Of course, it is safer to jump a short way down than to stay in a burning building.
Windows are also useful when you are waiting for help. Be sure to keep the door closed before opening the window. Otherwise, smoke and fire may be drawn into the room. Keep your head low at the window to be sure you get fresh air rather than smoke that may have leaked into the room.
On the second or third floor, the best windows for escape are those which open onto a roof. From the roof a person can drop to the ground more safely. Dropping onto cement might end in injury. Bushes and trees can help you to have a soft landing.
小题1:Which of the following should not be used when trying to escape from a fire?
A.Windows B.ElevatorsC.Fire exitsD.Stairways
小题2:How far from the ground is the second floor window?
A.about 12 feetB.about 6 feet
C.about the height of an average manD.nearly 10 feet
小题3:According to the passage, windows are ______ of escaping a fire?
A.the only wayB.the best way
C.safer than any other waysD.one of the possible ways
小题4:The writer suggests that _______
A.breathing in smoke might be harmfulB.smoke will enter the room through an open window
C.fresh air can’t reach the second floor window
D.to keep you head low will help you to escape a fire
小题5:If you are on the second or third floor when a fire breaks out, you’d better _____
A.drop directly onto the groundB.first drop onto a roof then onto the cement
C.drop from a roof window then onto bushes and trees
D.drop onto the cement rather than bushes and grass
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我们一般把聚落分为两大类,它们分别是()

A.乡村和城市

B.工业和农业

C.农田和村庄

D.工厂和城市

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下列哪项的实验室检查不符合缺铁性贫血()

A.血象表现为小细胞低色素性贫血

B.骨髓增生活跃

C.骨髓有红细胞增生,中幼红细胞及晚幼红细胞比例增高

D.血清铁蛋白降低

E.血清铁降低,总铁结合力降低

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