问题 实验题

黄瓜、南瓜、丝瓜等植物的花多半都不会结果。请你解释这种现象。(4分)

答案

因为这些植物的花是单性花,分为雌花和雄花,同一植株上有雌花,也有雄花,雄花是不会结果的。

题目分析:根据雌蕊和雄蕊的有无,花可以分为两性花和单性花,在一朵花中同时具有雄蕊和雌蕊的花叫做两性花,在一朵花中只有雌蕊或者只有雄蕊的花叫做单性花,在单性花中,只有雌蕊的花叫雌花,只有雄蕊的花叫雄花,黄瓜和南瓜都是单性花,“谎花”是雄花,只有雄蕊,没有雌蕊,所以不能结出果实。

点评:此题为基础题,考查的是花的类型,解答此题的关键是熟知根据雌蕊和雄蕊的有无,花可以分为两性花和单性花。

阅读理解

It was a comfortable sunny Sunday. I was going to meet an old university friend I hadn't seen for years, and was really excited to hear all his news.

My train was running a little late, but that was no big problem - I could text him to say I would be delayed. He would understand. But… where was my mobile phone? I had that familiar sinking feeling. Yes, I'd forgotten it at home.

No mobile phone. I'm sure I'm not alone in feeling anxious, on edge and worried when I don't have my phone with me. In fact, I know I'm not alone: two-thirds of us experience ‘nomophobia’, the fear of being out of mobile phone contact.

That's according to a study from 2012 which surveyed 1,000 people in the UK about their relationship with mobile phones.

It says we check our mobile phones 34 times a day, that women are more ‘nomophobic’than men, and that 18-24 year-olds are the most likely to suffer fear of being without their mobiles: 77% of them say they are unable to be apart from their phones for more than a few minutes.

Do you have nomophobia ?

· You never turn your phone off

· You obsessively check for texts, missed calls and emails· You always take your phone to the bathroom with you· You never let the battery run out

It's funny to think that around 20 years ago the only people with mobile phones would be businessperson carrying their large, plastic ‘bricks’.   Of course, these days, mobile phones are everywhere. A UN study from this year said mobile phone subscriptions would outnumber people across the world by the end of 2014.

And when there are more phones than people in the world, maybe it's time to ask who really is in charge? Are you in control of your phone, or does your phone control you?

So, what happened with my university friend? When I arrived a few minutes late he just laughed and said: "You haven't changed at all – still always late!" And we had a great afternoon catching up, full of jokes and stories, with no interruptions and no nagging(唠叨的) desire to check my phone.

Not having it with me felt strangely liberating. Maybe I'll leave it at home on purpose next time.

小题1:What does the passage talk about ?

A.The history of mobiles.

B.The story of meeting an old university friend.

C.The addiction of playing mobile phone.

D.The terrible feeling of being without their mobiles.小题2:The underlined phrase “ on edge ”in the third paragraph probably means_______.

A. nervous

B.energetic

C.crazy

D.surprised小题3:Which word is used to describe old mobile phones according to the passage?

A.digital phone

B.cell phone

C.bricks

D.smart phone小题4:According to the passage, who is most likely to be addicted to mobiles ?

A.a successful manager

B.a 21-year-old girl

C.a 21-year-old boy

D.a lonely middle-aged person小题5:What’s the author’s attitude towards the using mobiles ?

A.Worried

B.Favorable

C.Neutral

D.Critical

填空题