磁场中磁力线越稀疏的地方磁场()。A、越强 B、越弱 C、与磁力线无关 D、为零

题型:单项选择题

问题:

磁场中磁力线越稀疏的地方磁场()。

A、越强

B、越弱

C、与磁力线无关

D、为零

考点:天然气净化操作工考试天然气净化操作工中级天然气净化操作工中级题库
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Shows at the Palace Museum
The Palace Museum is a wonderful place to visit. There are lots of fun and interesting things to see. Come to visit the Palace Museum.
Closing Time
 Place      
 Things to See
10:00 a.m.
Taihe Palace
Golden Throne
10:30 a.m.
Zhonghe Palace
Works of Art
11:00 a.m.
Baohe Palace
Works of Art
1:00 p.m.
Jingren Palace
Bronzes(青铜器)
1:40 p.m.
Yonghe Palace
Pottery(陶器)
2:30 p.m.
Huangji Palace
Chinese Paintings
4:00 p.m.
Fengxian Palace
Clocks and watches
 
Tickets:
Adults:
¥15.00
Children:
Over12: ¥10.00      Under12: Free(免费)
Opening Time:
9:00a.m.~ 4:00 p.m.
10:00a.m.~ 3:00p.m. on Saturday
Not open on Sunday
Notices(注意):
Keep quiet.
Keep the museum clean.
Don’t forget(忘记) to buy some souvenirs(纪念品)for your friends and family.
Do not take any photos.
Do not touch (触摸)anything.
小题1:How many kinds of things can you see at the show ?
A.FourB.FiveC.SevenD.Eight
小题2:When can you see clocks and watches?
A.At 1:40 p.m. from Monday to Saturday
B.At 4:00 p.m. on Saturday
C.At 4:00 p.m. every day
D.At 4:00 p.m. from Monday to Friday
小题3:Mr. Wu wants to visit the show with his two students this Saturday. The two students are both 14. How much are the tickets together?
A.¥35.00B.¥28.00 C.¥15.00D.¥7.00
小题4:The Palace Museum opens ________ days a week.
A.TwoB.FiveC.Six D.Seven
小题5:Which of the following can you do at the show?
A.To talk to each other.B.To take a few nice photos.
C.To buy some souvenirs.D.To touch golden throne.
题型:单项选择题

椎间盘感染首选的影像学检查方法是()

A.X线平片

B.DSA

C.MRI

D.核素

E.超声

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下列进行出芽生殖的一组是(  )

A.马铃薯长出新芽与甘薯长出新芽

B.竹节上长出新芽与水螅长出芽体

C.草莓枝上长出新芽与仙人球上长出芽

D.水螅长出芽体与酵母菌长出芽体

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(11分)地球质量为M,半径为R,自转角速度为,万有引力恒量为G,若规定物体离无穷远处势能为0,则质量为的物体离地心距离为时,具有的引力势能可表示为

(1)试证明一质量的卫星在离地面距离为时所具有的机械能为

(2)国际空间站是在地球大气层上空绕地球飞行的一个巨大人造天体,设空间站离地面高度为,如果在该空间站直接发射一颗质量为的小卫星,使其能达到地球同步卫星轨道并能在轨道上正常运行,该卫星在离开空间站时必须具有多大的初动能。

题型:单项选择题

壳斗是壳斗科植物的()

A.副萼

B.苞片

C.总苞

D.花盘

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