男性，70岁，经常便秘及腹部绞痛，腹胀明显，无呕吐（）。 A．粘连性肠梗阻 B．蛔虫

铜、氧气、二氧化碳、过氧化氢和一氧化碳是初中化学中常见的物质，下图是它们的部分应用．

这些物质中：

（1）铜常用于制作导线，因为其有良好的延展性和______性．

（2）可作制冷剂，用于人工降雨的物质是（填物质名称或化学式）______．

（3）高炉炼铁中还原氧化铁的化学方程式为______．

（4）户外探险者用含过氧化氢的消毒水处理伤口时会看到有小气泡产生，其化学方程式为______．

阅读理解。

     Question:What is more astonishing than a 60-ton whale on a

flatbed truck being driven down the street?

     Answer:A 60-ton whale on a flatbed truck exploding and rai-

ning blubber( fat of whales) all over the sidewalk.

    That's what happened in Taiwan recently,when a dead sperm

whale being shipped to the Halobios Research Centre for an autopsy

(尸体解剖) developed an extremely bad case of gas and blew up

before it reached its destination.

     The whale was found alive on a Taiwan beach last weekend,

and died shortly after it was discovered. Since the 56-foot whale was

the largest whale ever beached on Taiwan's shores,scientists wanted

to study it and perform an autopsy for educational purpose.

      Obviously,too much time passed between when the animal died

and the time it was set to be moved to the autopsy location,because

it had already started to go bad. When things rot,they give off gases

as a by-product. In the whale's case,the gases were trapped in its

belly. The pressure inside the rotting creature grew so much that it

popped like an over-filled balloon. Unfortunately,it was on a truck in

the middle of the city of Taiwan at the time ;cars and shops lining the

street were covered with whale bits and juices,much to their owners'

discouragement.

      According to news reports,traffic was tied up for hours while of

ficials tried to clean up the streets.

     Newspaper editors worldwide were probably smiling to them-

selves,since they had a ready-made headline; several reports about

the incident were titled " There  She  Blows ! " after the famous line

from the book Moby Dick.

1. The purpose of the question at the beginning of this news report  is to ___.

A. explain the reason

B. sell newspapers

C. attract readers

D. give an immediate answer

2. The whale's explosion was the result of___．     

A. pressure from gases building up in the creature as it began to rot

B. the long transport of the creature from the beach to the centre

C. the extremely busy traffic in the streets it passed by

D. the quick process of rotting of the animal

3. What is the correct order of the incidents?

        a. The whale was set to a flatbed truck.

        b. The whale was discovered.

        c. The whale exploded.

        d. The whale died.   

A. b;c;a;d                        

B. d;c;b;a

C. b;d;a;c                        

D. d;b;a;c

4. What do we know from the last paragraph?

A. Some newspaper editors were laughed at.

B. Moby Dick is the name of a woman writer.

C. All the newspapers reported the story under the same title.

D. The title" There She Blows ! " is taken from the book MobyDick.

12，4，4/3，4/9，( )

A．4/12

B．4/27

C．4/36

D．4/81

简述果实后熟及影响后熟的因素？

病毒的基因组可以由（）组成。

A.蛋白质

B.多糖

C.同一病毒中既有DNA，又有RNA

D.或DNA或RNA