问题 选择题

下列各项中,不能称为生态系统的是(  )

A.太平洋

B.梅江河

C.上官塘水库

D.一群羊

答案

由分析可知A、B、C都是既包括了生物生存的环境,又包括了环境中所有的生物,因此都是由生物与环境构成的一个生态系统.故A、B、C错.

D、一群羊:只有动物,没有植物、细菌真菌等生物,也没有环境,不符合生态系统的概念,因此不是生态系统.故D正确.

阅读理解

Poor weather. Technical difficulties. These are some of the typical causes of cancelled trains and planes. But sometimes, the excuse can be a lot more trivial.

Just recently, passengers waiting for a train to Peterborough heard the following announcement, “For reasons beyond our control, we regret to inform passengers that the 13:46 Train to Peterborough has been cancelled. The next train will be arriving on Platform in approximately 36 minutes.”

Oh, well, another delayed train, thought most passengers. But a couple of them decided to enquire further. Incredibly, they were informed that the real reason for the non-arrival of the train was that the driver refused to do his job because his seat was wet.

“A wet seat? That’s got to be a joke,” said one passenger angrily. “I wouldn’t normally complain if the train is just a bit delayed, but this was unbelievable, ” he added. “What really made me angry is that this driver refused to get in the train,” said another passenger. “He probably went off for a cup of tea after that!” she added.

A spokesperson for the rail company apologized for the incident, but said the driver couldn’t sit on the damp seat, and wouldn’t be able to drive the train standing up. The spokesperson went on to explain that the seat had become wet after water entered through an open window when the train was being cleaned in a “train wash”

In another transport-related incident, a flight from Chicago to Frankfurt made an emergency landing in Canada after the pilot spilled his coffee. Apparently, the spilt liquid caused the plane’s radio to send out “transponder code 7500”, which is used to inform ground control that there’s been a hi-jacking (劫机). After landing in Toronto, the 255 passengers crew members were put up in a hotel for the night, then flown on to Frankfurt the following afternoon. “What a disgusting trip!” said one tired passenger after the painful experience had ended.

So, does your job have the potential to cause such disorder?

小题1:Why did the driver of the train refused to do his job?

A.His seat was damp.

B.His pay was low

C.The weather was terrible

D.His coffee was spilled小题2:The underlined word “trivial” in Paragraph 1 means “____”.

A.damp

B.unimportant

C.emergent

D.convincing小题3:The flight made an emergency landing in Canada because “_______”.

A.the plane was hijacked

B.the plane engines went wrong

C.the pilot ran out of coffee

D.the plane’s radio sent out a wrong signal小题4:Which of the following is the best title of the passage?

A.Wet seat, Canceled Train!

B.Spilled Coffee, Emergency Landing!

C.Small Incident, Big Disruptions!

D.Innocent Driver, Angry Passengers!

单项选择题