故障的诊断通常按照（）先简后繁，先外后内，分短查找的方法。-我要搜题网

[单项选择]关于痴呆的临床特点，最正确的是（）.
A. 是先天或大脑发育成熟以前由于各种致病因素，造成智力低下
B. 老人儿童均可发生
C. 多数病人意识不清晰
D. 早期可表现为近记忆减退
E. 常无器质性病变

[单选题]作业人员应经医师鉴定，（）病症(体格检查每两年至少一次)。
A.无容易传染的
B.无不能治愈的
C.无慢性
D.无妨碍工作的

[不定项选择题]共用题干 The Mysteries of Nazca

In the desert of Peru,300 kilometers from Lima,one of the most unusual artworks in the world has
mystified（迷惑）people for decades._________(46 ) But from high above,these marks are huge images of
birds,fish,seashells,all beautifully carved into the earth.
The Nazca lines are so difficult to see from the ground that they weren't discovered until the 1930s,
when pilots spotted them while flying over the area. In all,there are about 70 different human and animal
figures on the plain,along with 900 triangles,circles,and lines.
Researchers have figured out that the lines are at least 1,500 years old,but their purpose is still a
mystery._________(47)However,it would probably be very tricky to land a spaceship in the middle of
pictures of dogs and monkeys.
In the 1940s,an American explorer named Paul Kosok suggested that the drawings are a chronicle(己
录）of the movement of the stars and planets._________(48)Later,an astronomer tested his theory with a
computer,but he couldn't find any relation between the lines and movements in space.
Another explanation is that the lines may have been made for religious reasons.British researcher Tony
Morrison investigated the customs of people in the Andes Mountain and learned that they sometimes pray by
the side of the road.It's possible that in the past,the lines of Nazca were created for a similar purpose.
_________(49)But the local people have never constructed anything this big.
Recently,two other scientists,David Johnson and Steve Mabee,have speculated that lines could have
been related to water. Nazca is one of the driest places in the world and receives only 2cm of rain every year.
While Johnson was searching for ancient water sources in the area,he noticed that some waterways built by
ancient people were connected with the lines.Johnson believes that the Nazca lines are a giant map of the
underground water in the area._________（50) _________(47)
A.Other scientists are now searching for evidence to prove this.
B.A Swiss writer named Erich Von Daniken wrote that the Nazca lines were designed as a landing place for UFOs.
C.Scholars differ in interpreting the purpose of the designs.
D.The largest pictures may have been the sites for special ceremonies.
E.Seen from the ground,it looks like lines scratched into the earth.
F.He called Nazca"the largest astronomy book in the world".

[单项选择]故障的诊断通常按照（）先简后繁，先外后内，分短查找的方法。A. 先听先看B. 先易后难C. 先摸后试

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[单项选择]故障的诊断通常按照（）先简后繁，先外后内，分短查找的方法。
A. 先听先看
B. 先易后难
C. 先摸后试