据观测,某行星外围有一环,为了判断该环是行星的连续物还是卫星群,可以测出环中各层

题型:不定项选择

问题:

据观测,某行星外围有一环,为了判断该环是行星的连续物还是卫星群,可以测出环中各层的线速度v的大小与各层至行星中心的距离R之间的关系[ ]

A.若v与R成正比,则环是连续物  

B.若v2与R 成正比,则环是卫星群  

C.若v与R成反比,则环是连续物  

D.若v2与R成反比,则环是卫星群

考点:万有引力定律的其他应用
题型:不定项选择
Wanda Shopping Centre Coupons (优惠券)
Six Hours Free Parking
  If you spend ¥100 or more in our stores, you will receive six hours of free parking. When you have spent ¥100 or more, just take this coupon to the customer (顾客) service desk and they will stamp your parking ticket to allow 6 hours of free parking.                      Offer available until December 14
Win a ¥1000 CD Collection
Win your choice of ¥1000 worth of CDs from JoJo’s Music Store. Just buy any two CDs and your name will go into the lucky competition. Select your own prize from various CDs of rock, pop, jazz and classical music. The competition ends on December 14. Prize announced on December 21.
Check JoJo’s store for more information.
10% Off
Present this coupon at the Book Store to get a 10% discount on any books you want. We have lots of books to choose from, including children's books, novels, travel guides and science fictions. You're sure to find something that you will enjoy. Shop now for Christmas, we have plenty of toys as gifts for you.
Offer available until December 14.
Half-price Movie Tickets
Buy any full-price movie ticket on weekdays, and you can buy a second ticket for a friend for only half price. The latest movies are all here, showing in any of our theaters at Wanda Sopping Center.
Off available until December 14
Free Soft Drink
Buy any meal for at least ¥6 at Mike's Café, and get a free soft drink ,We serve the best fast food in the Shopping Center. Come in and try our delicious meal and our excellent service. You won't be disappointed!
Free soft drink offer ends December 14.
小题1:What are the advertisements for?
A.Food you can order.B.Places to go on vacation.
C.Special offers at a shopping center.D.Things on sale in a big store.
小题2:. If you have spent¥100, you'll get ________ at the shopping center. 
A.six hours of free parking B.a free soft drink
C.a movie ticket at half priceD.two free CDs
小题3: Which of the following is not mentioned at this shopping center?
A.Book store.B.Music store.C.Restaurant.D.Toy store.
小题4: If you want to buy some books for¥50 with the coupon, you will have to pay________.
A.¥40B.¥45C.¥55D.¥60
小题5: We can know from this passage________.
A.you and your friends can use these coupons at Christmas
B.there is more than one theatre in the center
C.you will win ¥1000 worth of CDs from JoJo’s Music Store if you buy two CDs
D.you only need to pay 6 yuan for the best fast food.
题型:不定项选择

高考填报志愿时,既想学计算机,又想学经济管理,这属于()。

A.双趋式冲突

B.双避式冲突

C.趋避式冲突

D.双重趋避式冲突

题型:不定项选择

光激励荧光体中,为改变荧光体的结构和物理特性,常掺入的是()

 

A.Al3+

B.Eu2+

C.Cu2+

D.TI2+

E.Se2+

题型:不定项选择

快速耐受性:

A.以上C、D两项正确

B.是药物在长时间内反复应用数次后产生药效递减的现象

C.增加用药剂量仍可达到原有效应

D.增加用药剂量亦难以达到原有效应

E.是药物在短时间内反复应用数次后产生药效递减直至消失

题型:不定项选择

单个分区存储管理仅适用于 【8】 和专用计算机系统。

更多题库