问题 单项选择题

组成生物的化学元素在生物体中起重要作用。下列关于几种元素与光合作用关系的叙述中,正确的是()

A.C是组成糖类的基本元素,在光合作用中C元素从CO2先后经C3、C5形成CH2O

B.N是叶绿素的组成元素之一,没有N植物就不能进行光合作用

C.O是构成有机物的基本元素之一,光合作用制造的有机物中的氧来自于水

D.P是构成ATP的必需元素,光合作用中光反应和暗反应过程均有ATP的合成

答案

参考答案:B

阅读理解

A new study has found that the best way to make yourself feel happier is to think of something good that happened to you the day before.

Volunteers who were asked to remember a pleasant event from past 24 hours began to feel happier right away.Other activities such as saying “Thank you” and smiling also made volunteers feel happier, but not as much.

Professor Richard Wiseman of Hertfordshire University planned the study.He got 26,000 people to go online to try out a few different activities to make them feel happier.They were told to be nice, remember a pleasant event from the day before, give thanks or smile for 15 seconds twice a day.The volunteers did these activities for one week.

The result showed that thinking about one good thing that had happened the day before worked the best for making people happier.(146 words)

小题1:The text may probably be taken from _____.

A.a personal anecdote(轶事)

B.sports news

C.a history novel

D.brief news小题2:Volunteers who _____ began to feel happier right away.

A.thought of something good that happened the day before

B.were asked to remember a pleasant event from the past 24 hours

C.did other activities like saying “thank you” and smiling

D.went online to try out a few different activities小题3:From the text we know that Richard Wiseman is a(an) _____.

A.worker

B.artist

C.professor

D.director小题4:The best title may probably be _____.

A.Thinking about yesterday’s happiness to be happy today

B.Making a study to make people happier and younger

C.Letting out a secret to live a longer life

D.Doing experiments to make people happier

问答题