下列为肺炎双球菌所不具有的是() A.细胞质 B.细胞膜 C.线粒体 D.核酸

题型:单项选择题

问题:

下列为肺炎双球菌所不具有的是()

A.细胞质

B.细胞膜

C.线粒体

D.核酸

考点:高中生物细胞的结构与功能细胞的结构与功能题库
题型:单项选择题

急性白血病出血的主要原因是()

A.弥散性血管内凝血

B.血小板数量减少

C.血小板功能异常

D.凝血因子减少

E.血管损伤

题型:单项选择题

同学们以盖房子的方式总结出了如下物质间的关系.A、B、C均为纯净物,且上、下相邻的物质间均可发生反应.回答下列问题.

(1)若B是氧气,A是最理想的清洁燃料,则A与B反应的化学方程式为         

(2)若B是氧气,B与C的反应现象为红色固体逐渐变成黑色,则C是     

(3)若B是一氧化碳,B与C的反应可用于高炉炼铁,则该反应的化学方程式为                   ,高炉炼铁得到的是    (填“生铁”或“纯铁”).

题型:单项选择题

假设在关系模式R(U)中,X、Y、Z都是U的子集,且Z=U-X-Y。若x→→Y,则称 X→→Y为【 】。

题型:单项选择题
Italian Lakes and Greek Islands(12days)
Prices starting from$1999
Your tour begins in Milan, Italy, and moves on to the pretty Italian Lake District and the attractive resort(胜地) of Stresa, your home for two nights. Collette Vacations has carefully chosen the Costa Victoria as your home away from home for your 7-night journey along the waterways of the Mediterranean. The cruise ship is filled with the warmth and culture of Italy and is richly designed with entertainment(娱乐) areas and very good living conditions. It will take you to the places of your dreams.
You’ll spend 4 days touring Greek cities you’ve always heard about. In Katakolon, you will have the only unguided tour to nearby Olympia on the whole journey. Then with a local guide you will visit the Greek islands of Santorini, which is often related to the story of the lost city Atlantis, and Mykonos, a wonderful island with beautiful beaches.
Your journey ends in Verona, home of the love story Romeo and Juliet, with a fun-filled farewell dinner--- a perfect ending to a pleasant journey.
12Days, 25 Meals, 10 Breakfasts, 6 Lunches, 9Dinners
Day 1      Overnight fight to Italy
Day 2-3    Regina Palace, Stresa, Italy
Day4—10  Costa Victoria (Costa  cruises)
Day11     Hotel Leopardi, Verona, Italy
Day12     Leave for home
Please Note
Leaving date
Price for one person
April 7
$ 2 099
June 2
$ 2 199
October 6
$ 2 099
November 3
$ 1 999
小题1:How is the journey planned?
A.It starts and ends in Italy.
B.It starts and ends in Greece.
C.It starts in Italy and ends in Greece.
D.It starts in Greece and ends in Italy.
小题2:What can be inferred from the travel plan?
A.The price may get lower than those in the plan.
B.The price include three meals a day.
C.The price is the highest in summer.
D.The prices include entertainment service.
小题3:What does the underlined part “the Costa Victoria” most probably refer to?
A.A famous hotel.B.A beautiful resort.
C.A comfortable ship.D.A long-distant bus.
小题4:Tourists will travel on their own in _____.
A.StresaB.OlympiaC.MykonosD.Verona
题型:单项选择题

读图,回答:

C点的地理坐标为(),C点关于地心对称点的地理坐标为()。

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