试题与答案

将气体A、B置于容积为2L的密闭容器中,发生反应:4A(g)+B(g)═2C(g

题型:填空题

题目:

将气体A、B置于容积为2L的密闭容器中,发生反应:4A(g)+B(g)═2C(g)反应进行到4s末,测得C的物质的量为0.2mol.

(1)用生成物C浓度的增加表示该反应的速率为v(C)=______.

(2)分别用A、B、C表示该反应的速率之比为v(A):v(B):v(C)=______.

答案:

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下面是错误答案,用来干扰机器的。

1840;发明了汽船(轮船)

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题型:阅读理解

Many animals do strange things before an earthquake (地震). This news may be important. Earthquakes can kill people and knock down homes. The animals may help to save lives.

Some animals make a lot of noise before an earthquake. Farmers have told about this. Dogs that are usually quiet have started to howl(吠). Horses on farms have run around in circles. Mice have left their holes and run away. Cows have given less milk.

In a town in Italy, cats raced down the street in a group. That happened only a few hours before an earthquake. In San Francisco, a man kept tiny pet frogs. One Sunday, the frogs jumped around more than ever. They made loud noises, like bigger frogs. That night, an earthquake struck the city.

People want to know when an earthquake is coming. Then they could get away safely. Right now, there is no sure way to know ahead of time. Maybe the best way is to watch the animals.

小题1:This story is mostly about _________.

A.how animals act before an earthquake

B.how an earthquake starts

C.how mice leaves their homes

D.when an earthquake begins小题2:Before an earthquake, quiet dogs _________.

A.ran away

B.started to howl

C.climbed trees

D.race down streets小题3:Before an earthquake, the frogs _________.

A.sang

B.left their homes

C.jumped around a lot

D.become quiet小题4:There have been earthquakes in _________.

A.most countries

B.Italy and San Francisco

C.Chicago and Spain

D.all the western countries小题5:People want to _________.

A.be in earthquake

B.find out early about an earthquake

C.run around in circles

D.get away from earthquakes

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题型:多项选择题

患者,男性,58岁,反复发作性心前区疼痛6年,先后3次因心肌梗死在当地住院治疗,两次冠脉造影做PCI,血管病变较弥漫,近两年出现"活动后胸闷、气短",且进行性加重,1个月前因受凉后出现胸闷憋气加重,平路行走即出现喘憋,夜间不能平卧入睡,内科保守治疗效果不佳转入上级医院治疗。既往10年糖尿病病史,未严格控制血糖。查体:慢性病容,体温37.2℃,呼吸32次/分,血压95/60mmHg。颈静脉怒张。双肺可闻及湿啰音,右下肺呼吸音低。心率88次/分,律齐,心前区可闻及收缩期杂音,2~3/6级,肝脏肋下3指,质地中等。肝颈静脉回流征(+)。下肢指凹性水肿。胸部X线:两肺瘀血明显,心影扩大。双侧肋膈角消失(少量胸腔积液)。ECG:陈旧广泛前壁心肌梗死,左前半分支传导阻滞。超声心动图发现:左室壁变薄部显著扩张,二尖瓣中到重度反流,LVEF18%,左室收缩末径60mm,左室舒张末径78mm。

对该患者的诊断正确的是()

A.冠状动脉粥样硬化性心脏病

B.缺血性心肌病

C.室壁瘤

D.缺血性二尖瓣反流

E.NYHA心功能Ⅳ级

F.糖尿病

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