发动机出现清脆声响,怠速或低速时较为明显;随着转速的升高,声响随之增大,急加速时声响

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问题:

发动机出现清脆声响,怠速或低速时较为明显;随着转速的升高,声响随之增大,急加速时声响更大,可能的故障原因是()。

A.润滑不良

B.活塞销、活塞孔、连杆衬套及锁环故障

C.曲轴轴承故障

考点:经营性道路运输驾驶员考试汽车常见故障处理汽车常见故障处理题库
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为确诊,最有效的检查方法是

A.食管镜取活组织检查

B.反复采用摩擦拉网法

C.开胸探查

D.隔期食管钡透视

E.反复行纵隔CT检查

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More than an eye candy

Parents in Beijing are ready to go a little further to please their children now that the new China Science and Technology Museum has opened its 198-seat 4D theater.

The 4D theater, which opened last month (December ), is the third cinema the museum has opened to the public since its relocation to the National Olympic Park in September.

YAOX Entertainment, a Taiwan-based company producing 3D,4D,special effects and animated films, is responsible for providing the films in the coming month.

As for 3D films, audiences have to wear special goggles while watching these movies. In addition, viewers can feel wind, a rainstorm, or waterfall, and the seats will move according to the plot.

Admission for adult visitors is 30 yuan per person, 20 yuan for students and children.

The new China Science and Technology Museum, 5 Beijing Donglu, Chaoyang District.

Film introduction

U-Bugs Adventure: Under attack in an air-sea fight, a German U-boat from World War II dives deep for protection. The strong tides take it to a mysterious ancient city at the bottom of  the. Suddenly, a giant sea monster takes on the sub(潜水艇) and during the struggle it falls into an energy light-beam zone, and is transported through a time tunnel to meet with Zheng He’s 14th century fleet sailing to the West. Duration: 15 minutes

Dog & Bugs: A dog sees some bees buzzing around and wonders: “How can I fly in the sky as free as those bugs?” Then, he sprouts a pair of wings, just like the bees, and flaps his wings to join them and collect some honey. Duration: 15 minutes

Virus to Go: This film is about severe acute respiratory syndrome (SARS), which is like a terrorist attack, causing extensive contamination(大范围的感染). Because of human neglect(忽视), the SARS virus cannot be stopped and causes harm to an entire city. Fortunately, at the last minute, man finds a way to solve the crisis. Duration: 15 minutes

68.The underlined word“goggles”means       .

A.a type of watch                  B.a kind of glasses

C.ear-protecting equipment          D.a piece of jewellery 

69.If you happen to be interested in Sci-fi & history films, most probably            should be your cup of tea.

A.the mew China Science and Technology Museum    B.U-Boat Adventure

C.Dog & Bugs                                 D.Virus to Go

70.In which section of an English newspaper can you find the information above?

A.News    B.Business    C.Entertainment    D.Sports

题型:多项选择题

简述草坪草的坪用特性。

题型:多项选择题

直肠下端有数个纵形皱襞称为()。

题型:多项选择题

每题给你一个数列。但其中缺少一项,要求你仔细观察数列的排列规律综合判断。然后从四个供选择的选项中选出最恰当的一项。来填补空缺项。


2,3,12,33,102,( )。

A.237
B.303
C.168
D.372

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