某化工厂进行机电设备安装工程,主要是锅炉安装、空调安装和电线、电缆的安装工程。工程要

题型:单项选择题

问题:

某化工厂进行机电设备安装工程,主要是锅炉安装、空调安装和电线、电缆的安装工程。工程要求十分严格,部分设备要求采用优质碳素结构钢,锅炉采用耐高温材料,空调通风管道采用绝热材料,电线导管用防腐的塑料制品,电线采用BX或BV型,电缆采用VLV32或VV32型。安装完经检验合格后,交付使用。

下列非金属风管中,()适用于洁净室内含酸碱的排风系统。

A.酚醛复合风管

B.聚氨酯复合风管

C.玻璃纤维复合风管

D.硬聚氯乙烯风管

考点:二级建造师机电工程机电工程管理与实务
题型:单项选择题

我市已经全面实行九年级化学实验考查。

(1)A小组在考查时抽到的题目是:气体的制备。要完成的题目是“二氧化碳的制取、收集和验满”。下图是小明同学实验时的主要步骤,这些步骤的正确顺序是              (填字母标号,下同) ,其中操作有误的是                 。

(2)B小组在考查时抽到的题目是:溶液的配制。实验室提供了下列仪器:

小华同学要用固体氯化钠配制10%的氯化钠溶液,小亮同学要用浓盐酸配制10%的稀盐酸。上述仪器中,两位同学都不需要的仪器是               (填仪器名称,后同)小华需要而小亮不需要的仪器是 _________ 。

题型:单项选择题

Thousands and thousands of people lost their homes in the earthquake and it was impossible to

provide them _____ enough food, clothing and _____at that time.    [ ]

A. with; shelter  

B. for; houses  

C. by; housing  

D. with; shelter

题型:单项选择题

Questions 63 t0 67 are based on the following passage:The Last Supper is a late 15th-century mural painting by Leonardo da Vinci in the refectory of the Convent of Santa Maria della Grazie, Milan. The work is presumed to have been commenced around 1495 and was commissioned as part of a scheme of renovations to the church and its convent buildings by Leonardo’s patron Ludovico Sforza, Duke of Milan. The painting represents the scene of The Last Supper of Jesus with his disciples, as it is told in the Gospel of John. Leonardo has depicted the consternation that occurred among the Twelve Disciples when Jesus announced that one of them would betray him. The Last Supper measures 460cm x880cm and covers an end wall of the dining hall at the monastery of Santa Maria delle Grazie in Milan, Italy. The theme was a traditional one for refectories, although the room was not a refectory at the time that Leonardo painted it. The main church building had only recently been completed (in 1498), but was remodeled by Bramante, hired by Ludovico Sforza to build a Sforza family mausoleum. The painting was commissioned by Sforza to be the centerpiece of the mausoleum. The lunettes above the main painting, formed by the triple arched ceiling of the refectory, are painted with Sforza coats-of-arms. The opposite wall of the refectory is covered by the Crucifixionfresco by Giovanni Donato da Montorfano, to which Leonardo added figures of the Sforza family in tempera.Leonardo began work on The Last Supper in 1495 and completed it in 1498-he did not work on the painting continuously. The beginning date is not certain; as the archives of the convent for the period have been destroyed and a document dated 1497 indicates that the painting was nearly completed at that date. One story goes that a prior from the monastery complained to Leonardo about the delay, enraging him. He wrote to the head of the monastery, explaining he had been struggling to find the perfect villainous face for Judas, and that if he could not find a face corresponding with what he had in mind, he would use the features of the prior who complained.In common with other depictions of The Last Supper from this period. Leonardo seats the diners on one side of the table, so that none of them have their backs to the viewer. Most previous depictions excluded Judas by placing him alone on the opposite side of the table from the other eleven disciples and Jesus or placing halos around all the disciples except Judas. Leonardo instead has Judas lean back into shadow. Jesus is predicting that his betrayer will take the bread at the same time he does to Saints Thomas and James to his left, who react in horror as Jesus points with his left hand to a piece of bread before them. Distracted by the conversation between John and Peter, Judas reaches for a different piece of bread not noticing Jesus too stretching out with his right hand towards it. The angles and lighting draw attention to Jesus, whose head is located at the vanishing point for all perspective lines. The painting contains several references to the number 3, which represents the Christian belief in the Holy Trinity. The Apostles are seated in groupings of three; there are three windows behind Jesus; and the shape of Jesus’ figure resembles a triangle. There may have been other references that have since been lost as the painting deteriorated.

As it is told in the Gospel of John, the painting represents____

A.the scene of the last supper of Jesus with his twelve disciples

B.Leonardo met with the twelve disciples when Jesus announced that one of them would betray him

C.an end wall of the dining hall at the monastery of Santa Maria delle Grazie in Milan, Italy

D.the centerpiece of the mausoleum for the Sforza family

题型:单项选择题

有关Rh血型系统,不正确的是()。

A.Rh血型系统是最复杂的血型系统之一

B.Rh血型中以D抗原最强,故临床上只按D抗原的存在与否来分型

C.我国汉族人口99%以上为Rh阴性

D.Rh抗体系统并非天然存在

E.Rh阴性孕妇第二次孕Rh阳性胎儿时,可致新生儿溶血

题型:单项选择题

栽种时的要点是什么?株间距是多少?

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