问题 解答题
求下列各式中的x.
(1)125x3=8
(2)(-2+x)3=-216
(3)
3x-2
=-2
(4)27(x+1)3+64=0
答案

(1)∵x3=

125
8
=(
5
2
)
3

∴x=

5
2

(2)∵(-2+x)3=-216=(-6)3

∴-2+x=-6,

x=-4.

(3)∵

3x-2
=-2,

∴x-2=-8,

x=-6.

(4)∵(x+1)3=-

64
27

∴x+1=-

4
3

x=-

7
3

阅读理解

Franklin’s ships had everything they needed . They had enough food in tins for three years and thousands of litres of lemon juice to stop disease. They also had two libraries with 3,000 books , excellent maps , scientific instruments , musical instruments and a new invention: a camera.

Franklin and his men left Engand on May 19th , 1845 and they sailed without problems across the Atlantic towards Canada . When Franklin arrived at Baffin Bay in July 1845, things were going very well for the expedition . On July 26th , some sailors saw Franklin’s ships when they were entering the bay . That was the last time that anyone saw Franklin and his men alive .

The British government became very worried when they heard nothing from Framklin . They sent expeditions to 1ook for him , but the expeditions all returned without any news . The government offered £20,000 to anybody who could help Franklin or anybody who had information about Frailklin . Nobody came with information .

Then, in August 1850 some sailors found the first signs of the Franklin Expedition while  they were searching on Devon Island: some old food tins , some papers , and , something very  strange , the graves of three men . The men all died in January 1846 while Franklin was waiting in Baffin Bay for the ice to melt . But why did they die? The three men were all young and three deaths in the first months of the expedition were very strange . What happened to them ? And where were the ships and all the other sailors? The mystery of the Franklin Expedition was growing stronger…

小题1:Franklin’s ship was last seen by some sailors when       .

A.reaching in Atlantic on May 19th , 1845

B.entering a bay on July 19th , 1846

C.arriving at Baffin Bay in July 1845

D.coming into Baffin Bay on July 26th , 1845小题2:At last the first signs of the Franklin Expedition were found         .

A.in August 1850 on Devon Island

B.in January 1846 near Baffin Bay

C.on May 19th , 1845 near Baffin Bay

D.in January 1846 on Devon Bay小题3:The word “melt” in the last paragraph means        .

A.go away

B.pass

C.break into pieces

D.turn into water小题4:Which of the following statements is NOT right?

A.Franklin was a British sailor .

B.According to the passage , people don’t know why they died and what happened to them in the passage .

C.On July 26th , 1845 some sailors saw Franklin’s ship entering Baffin Bay .

D.Franklin’s ships had everything they needed , so it was too heavy to sail .小题5:The best title of the passage is        .

A.The Mystery of the Franklin Expedition

B.Franklin’s Ships

C.Iceberg Was the Killer

D.Sailing sometimes Was Very Dangerous

问答题 简答题