问题 选择题

下列关于小麦和松树共同特征的叙述,错误的是(  )

A.都能产生种子

B.根、茎、叶都很发达

C.受精过程都出现了花粉管

D.种子外面都有果皮包被

答案

松树是裸子植物,有根、茎、叶、种子四种器官,着生在雌球花上的胚珠是裸露的,没有子房壁包被,由胚珠发育成的种子也是裸露的,无果皮包被,松树的球果不是果实,其受精过程都出现了花粉管;小麦是被子植物,其胚珠外面有子房壁包被,其受精过程都出现了花粉管,受精作用脱离了水的限制,在完成传粉和受精作用后,胚珠发育的种子外面有由子房壁发育成的果皮包被,具有根、茎、叶、花、果实和种子六大器官.可见D符合题意.

故选D

阅读理解

阅读理解。

     The most popular way to welcome the new year in the United States is to have a big party. Some

parties are at people's homes. But in recent years,it has become more and more common for Americans

to go to a hotel or a club or a restaurant on the night of December the 31st. There,they can have dinner,

drink and dance.

       Most New Year's parties have something in common. First of all, they are usually noisy. People sing

and bands play. And often, guests pull a cracker when the clock strikes twelve at midnight. People think

that loud sounds would drive away the evil spirits of the old year before the new year begins.

       For many people New Year Eve is the night when they can drink as much as they like. Some New

Year's celebrations have ended sadly for people who got drunk and had driving accidents. Radio and

television announcements warn people of the danger of drunk driving. Some places offer free rides home

for drunken people.

    The biggest and noisiest New Year party in the United States takes place at Times Square in New

York City. Thousands of people gather there. Some of them ring bells or let off crackers. Others blow

whistles or car horns. And at 12 o'clock,they begin to cheer as an electric sign in the shape of a red apple

lights up on top of a tall building.

     The Americans keep up important traditions as the new year begins. They make decisions about how

to improve themselves in the year ahead. Experts say that the most common New Year decision in

the United States is to eat less. But many Americans also promise themselves to stop smoking,or stop

drinking wine,or to be nicer to their friends and families.

    Experts find fewer than ten percent of Americans carry out their New Year decisions. Few want to

give up this tradition. Almost everyone seems to enjoy looking back over the year that has just ended and

looking forward to a nice beginning of a new year.

1. The article is about____.    

A. some important traditions in the USA

B. when and where the Americans welcome the new year

C. New Year' celebrations in the USA

D. American ways of life and their interests

2. Most New Year parties are usually noisy,because ____ .  

A. people sing songs

B. bands play music

C. guests pull crackers

D. people want to get rid of bad luck of the old year

3. In order to prevent car accidents ____on New Year's Eve. 

A. many Americans promise to stop drinking wine

B. drunken people are forbidden to drive, but can be driven home free

C. little wine is served at New Year' celebrations

D. people are warned of the danger of drinking too much

单项选择题