如图是密闭体系中某反应的微观示意图,“ ”和“ ”分别表示不同原子. 请用下

题型:填空题

问题:

如图是密闭体系中某反应的微观示意图,“

”和“

”分别表示不同原子.

请用下列粒子的字母序号回答(1)、(2)两个小题:

A.

B.

C.

(1)依据质量守恒定律,反应后方框内应再填入一个______粒子.

(2)该反应中的物质属于单质的有______.

(3)符合该微观示意图的一个具体反应的化学方程式为______.

(4)由此反应可知分子与原子主要不同之处是(答出一点即可)______.

考点:化学反应微观示意图质量守恒定律化学反应方程式的书写文字表达式分子的定义
题型:填空题

撑一把雨伞行走在雨中,如图所示,一阵大风吹来伞面严重变形,因为伞上方的空气流速大于下方的空气流速,向上的压强______(填“大于”或“小于”)向下的压强;若伞受到的所有力同时消失则伞将______(填“静止”、“下落”或“向右做匀速直线运动”).

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急诊室抬来25岁妊娠足月初产妇,家属代述乡医院诊断为肩先露,嘱去大医院处理.

娩出的新生儿颜面及全身皮肤青紫,呼吸表浅,心率120次/分且有力,此时首先应作的处置是()

A.吸氧

B.保暖

C.行人工呼吸

D.清理呼吸道

E.纠正酸中毒

题型:填空题

If soldiering was for the money, the Special Air Service (SAS) and the Special Boat Service (SBS) would have disintegrated in recent years. Such has been the explosion in private military companies (PMCs) that they employ an estimated 30 000 in Iraq alone -- and no government can match their fat salaries. A young SAS trooper earns about£ 2,000($3 500) a month; on the "circuit", as soldiers call the private world, he could get £15 000. Why would he not

For reasons both warm-hearted and cool-headed. First, for love of regiment and comrades, bonds that tend to be tightest in the most select units. Second, for the operational support, notably field medicine, and the security, including life assurance and pension, that come with the queen’s paltry shilling.

Although there has been no haemorrhaging of special force (SF) fighters to the private sector, there has been enough of a trickle to cause official unease. A memo recently circulated in the Ministry of Defence detailed the loss of 24 SF senior non-commissioned officers to private companies in the past year. All had completed 22 years of service, and so were eligible for a full pension, and near the end of their careers. Yet there is now a shortage of hard-bitten veterans to fill training and other jobs earmarked for them, under a system for retaining them known as "continuance."

America has responded to the problem by throwing cash at it, offering incentives of up to $150 000 to sign new contracts. The Ministry of Defence has found a cheaper ploy. It has spread the story of two British PMC employees, recently killed in Iraq, whose bodies were left rotting in the sun

It can be inferred from the first paragraph that()

A. the private world is called "circuit" by soldiers

B. PMCs employ an estimated 30 000 soldiers in Iraq alone

C. Britain’s best soldiers stand resolute against mammon

D. A young SBS trooper earns about £15 000

题型:填空题

盛唐时期公认的边塞诗派的主将是()。

A.王昌龄、高适

B.岑参、高适

C.王之涣、卢纶

D.岑参、王昌龄

题型:填空题

若尸体检验时在心脏或大动脉的血液内含有()以上的炭氧血红蛋白是生前烧死的证据。

A、70%

B、50%

C、20%

D、5%

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