利用小球藻培养液进行光合作用实验时,在其中加入抑制暗反应的药物后,发现在同样的光照条

题型:单项选择题

问题:

利用小球藻培养液进行光合作用实验时,在其中加入抑制暗反应的药物后,发现在同样的光照条件下释放氧气的速率下降。主要原因是()

A.叶绿素吸收光能的效率下降

B.[H]等的积累,光反应速率减慢

C.合成ATP所需酶的活性受到抑制

D.暗反应中生成的水减少,使光反应的原料不足

考点:高中生物光合作用光合作用题库
题型:单项选择题

确诊最有价值、最安全、快捷的辅助检查是

A.头颅X线平片

B.头颅B超

C.腰穿

D.颅脑CT扫描

E.TCD

题型:单项选择题

银行业从业人员不包括( )。

A.农业银行工作人员

B.银行工作人员

C.证券公司工作人员

D.汽车金融公司工作人员

题型:单项选择题

When you don’t have anything planned for the day or it’s rainy outside and your children are stuck in the house, why not sit around and tell them riddles? Telling riddles will make your family laugh and sometimes even scratch their heads, trying to figure out what the answer is.

Riddles have been a pastime for centuries. Not only have riddles been something for passing the time, but they have also been used to pass on secret information during the Second World War. Even the ancient Greeks used riddles. They would tell riddles at parties and whoever was the first to get them right would receive prize.

Most riddles use words that have double meanings or share the same sound like “hear” and “here”. So in order to get the riddle, you will have to do some creative thinking and think of all the possibilities of different words. The difficulty of figuring out the riddle is based on the riddle itself. The riddle has to provide you with enough clues to come to the right answer, but that doesn’t mean that the clues have to be easy.

If you are looking to tell riddles but don’t know any, you can look online and you will find a large number of sites that will have hundreds of different riddles to choose from. If you would like to look somewhere else then you could look at your local bookstore, where you will be able to find many different books with thousands of riddles to choose from. You can even find websites and books that will tell you how to write your own riddles.

After you have found some resources that have different riddles, you will need to read through them to find the right ones for you and your family: You will also need to make sure that your kids will have a chance to figure out the answers. So take your time and choose the right family riddles to tell.

小题1:What is the author’s main purpose in writing the text?

A.To recommend an interesting family activity.

B.To stress the importance of family activities.

C.To encourage children to read more books.

D.To introduce the history of riddles.小题2:From the text we know that riddles _______.

A.do not have enough clues

B.have a very long history

C.were used in World War One

D.were first used in ancient Rome小题3:In Paragraph 3, the author mainly ________.

A.discusses how riddles are created

B.explains why fiddles are interesting

C.tells people how to solve riddles

D.shows the benefits of telling riddles小题4:To collect riddles, the author suggests ________.

A.one way

B.two ways

C.three ways

D.four ways

题型:单项选择题

卵巢恶性生殖细胞瘤中放射敏感肿瘤是()。

A.卵巢内胚窦瘤

B.卵巢未成熟畸胎瘤

C.卵巢无性细胞瘤

D.卵巢混合性生殖细胞瘤

E.胚胎瘤

题型:单项选择题

A公司与B公司签订一份购买B公司某产品的合同,合同生效后,A公司以合同中没有明确约定该产品的质量为由拒绝履行合同。这种做法违反了《合同法》的有关规定。( )

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