在设备运行中,浮环始终保持与轴同心,如果转子因振动而轴心浮动,浮动中心将在油膜的浮力

题型:单项选择题

问题:

在设备运行中,浮环始终保持与轴同心,如果转子因振动而轴心浮动,浮动中心将在油膜的浮力下跟踪转子轴心,浮环中心与轴心的最大偏心值为浮动自身重量引起的微量偏心。以上这句话讲的是()的工作原理。

A、机械密封

B、迷宫密封

C、浮环密封

D、干气密封

考点:乙烯装置操作工乙烯压缩理论知识乙烯压缩理论知识题库
题型:单项选择题

As any diplomat from Britain, Austria or Turkey can tell you, handling the legacy of a vanished, far-flung empire is a tricky business. But for Georgia, the gap between old glory and present vulnerability is especially wide.

Today’s Georgia is diminished by war, buffeted by geopolitics and recovering from post-Soviet chaos. But 800 years ago the country was a mighty military, cultural and ecclesiastical force. Its greatest monarch, Queen Tamara, defeated many foes (including her first husband) and built fine monuments. In her time, Georgia also had a big stake in the Christian life of the Holy Land. From Jerusalem to the Balkans, Georgia’s priests, artists and church-builders were active and respected. So too were its poets, like Shota Rustaveli, the national bard who dedicated an epic to his beloved queen.

In between seeking western aid and coping with power cuts, modern Georgia has pledged to keep a wary eye on every place where churches, inscriptions and frescoes testify to its golden age. That includes Greece, Turkey, Bulgaria, Romania and above all, Israel. Last year, Georgians were enraged when a fresco of Rustaveli, in a Jerusalem church under the care of the Greek Orthodox Patriarchate, was defaced, then badly restored. This year, a better restoration was done, but Georgians now want a promise that in all future restoration their own experts can take part. They also want to stop the seepage of Georgian frescoes and icons, supposedly under the Patriarchate’s care, on to the art market. Several times, Georgia has had to use its meagre resources to buy back pieces of the national heritage. The hope is that things will improve with the recent election of a new Jerusalem Patriarch, after his predecessor was ousted under a cloud of scandal.

Georgia’s ties with Israel are good, thanks to a thriving Georgian-Jewish community with happy memories of its homeland. Georgia also gets along with Greece, amid a fug of sentimentality over legends about the Argonauts that link the two nations. But can these warm, fuzzy feelings translate into better protection for an ancient culture That will be a challenge for Geld Bezhuashvili, who succeeds Salome Zourabichvili, the French-born diplomat who was sacked, after a power struggle, as Georgian foreign minister on October 19th.

According to the text, Georgia used to be influential in ()

A. religion

B.agronomy

C. medicine

D. horticulture

题型:单项选择题

下列计价方法中,未采用历史成本计量属性的是()。

A、发出存货计价所使用的个别计价法

B、期末存货计价所使用的可变现净值法(即成本与可变现净值孰低法)

C、发出存货计价所使用的先进先出法

D、发出存货计价所使用的移动平均法

题型:单项选择题

吴茱萸汤证中有“吐利”,其病机为()

A.心肾阳虚,阴寒内盛

B.中阳不足,气机逆乱

C.脾肾阳虚,寒湿下注

D.脾肾阳虚,大肠滑脱

E.肝气郁滞,湿热下迫

题型:单项选择题

下面哪些是属于中国人民银行的职责范围:()

A、发布与履行其职责相关的命令和规章

B、发行人民币,管理人民币流通

C、监督管理黄金市场

D、负责金融业的统计、调查、分析和预测

E、从事有关的国际金融活动

题型:单项选择题

在中国电影发展史上,()年前后是一道重要的分水岭。中国左翼电影的开山之作是()。

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