下列不能遗传的性状是 A．具有皱裂的豌豆 B．带有绿色的豌豆 C．习惯用右手写字

Do you still get free plastic bags from the supermarkets? Things have changed.

China has banned (禁止) free plastic bags at shops and supermarkets, and people have to pay for using plastic bags. The rule started on June 1. It came because our country tried to make litter less. Making super-thin (超薄) plastic bags has also been banned.

The Chinese once used about 3,000,000,000 plastic shopping bags a day, and they have caused pollution of the environment. The bags have become a main cause of plastic pollution because they are easy to break and people throw them away here and there. So the Chinese people are encouraged to bring theft own bags for shopping.

What kind of shopping bag is the best to bring? Some students in Chongqing have a good idea. They make their own shopping bags. They use old clothes to make cloth bags, and send them to their parents as presents. They also ask theft parents and friends to use cloth bags instead of plastic ones. They think it is their duty to protect the environment.

根据短文内容，选择最佳选项。

小题1:People in China have to _____ now.

A．throw plastic bags here and there

B．collect plastic bags in the street

C．pay for using plastic bags at shops and supermarkets

D．use free plastic bags at shops and supermarkets小题2:China made this rule because plastic bags were bad for the ______

A．environment

B．litter

C．shops

D．supermarkets小题3:The Chinese people are encouraged to bring _____ for shopping.

A．no bags

B．free plastic bags

C．their own bags

D．super-thin plastic bags小题4:Some students in Chongqing ______

A．ask their parents to make cloth bags

B．make cloth bags themselves

C．pick up plastic bags everywhere

D．buy cloth bags for their parents小题5:What’s the main idea of this article?

A．Making super-thin plastic bags has been banned in China.

B．The bags have become a main cause of plastic pollution.

C．Some students in Chongqing begin to make their own shopping bags.

D．To protect the environment, free plastic bags have been banned in China.

亚洲地形特点是（　　）

A．以高原、平原为主

B．地面起伏很大，中部地势高，四周地势较低

C．以平原为主，地形单一

D．西部是山地，中部是平原，东部是高原

活性氧化铝型催化剂通常可使用（）。

A.2～3年

B.3～4年

C.4～5年

D.5～6年

下列各句表述正确的一项是

A．《陈情表》的“表”是古代书信的一种，一般以向上级或皇帝陈情为内容。《出师表》也是诸葛亮向蜀汉后主刘禅陈情的奏章。

B．《史记》是我国第一部纪传体通史。记载了上起传说中的黄帝，下至汉武帝太初年间三千年的历史。本纪、世家、列传用于记述人物事迹，这奠定了后世写正史的体例。

C．《楚辞》是战国时屈原的诗歌总集。屈原出身为楚国贵族，楚顷襄王时，被放逐沅湘流域，终因理想无从实现，遂投汨罗江自杀。

D．【正宫】是宫调名之一，《长亭送别》仅此一个宫调，但由若干个曲牌联成一套曲子，由旦、末角色轮唱到底。

去极化肌松药与乙酰胆碱受体结合后的变化的叙述正确的是（）

A.受体构型改变，离子通道开放

B.受体构型改变，离子通道不开放

C.受体构型不改变，离子通道不开放

D.受体构型不改变，离子通道开放

E.以上全不正确