问题 选择题

不完全变态和完全变态分别是指经过下列哪种发育过程(  )

①幼虫→若虫→成虫三个时期         

②受精卵→幼虫→蛹→成虫四个时期

③受精卵→若虫→成虫三个时期       

④受精卵→蛹→成虫三个时期.

A.④和①

B.④和②

C.③和①

D.③和②

答案

不完全变态发育是指幼体与成体的形态结构和生活习性非常相似,但各方面未发育成熟,发育经历卵、若虫、成虫三个时期,例如:蟋蟀、蝗虫等.

完全变态发育,昆虫在个体发育中,经过卵、幼虫、蛹和成虫等4个时期的叫完全变态发育.完全变态发育的幼虫与成虫在形态构造和生活习性上明显不同,差异很大.如蝶、蚊、蝇、菜粉蝶、蜜蜂,蚕等.

故选:D.

填空题
阅读理解

Three surfers rushed to save a man’s life after he was left drifting on a notorious stretch of water.

The men stayed with Greg Popple for 30 minutes and had to be rescued themselves by helicopter as the drama unfolded.

The 45-year-old had floated out on a body board near Hutchwns Point at 8:30 am. He found himself in trouble about half-a-mile from the shore and dangerously close to rocks. Surfers Graig Evans, 31, Robert Miles, 19, and Owain Daviees, 23, were risking their own safety to keep him floating for 30 minutes. Luckily a passer-by noticed what was going on and raised the alarm. Porthcawl Coastguard, Porthcaw Lifeboat and an RAF helicopter all took part in the rescue.

“The man who got into trouble was a body boarder-there was a big tide where he was,” said Joe Missen. “Three other surfers spotted he was in difficulty and he was going down. They kept him afloat because he was in a state of shock and out of energy. If Mr. Popple was closer to the rocks, it could have been a lot worse, but they managed to keep him from harm”.

Mr. Missen’s mum Alison, also part of the rescue team, said, “That part of the water is notorious for taking people out to nowhere”.

The three men had clocked off a night shift at Ford Motor Company shortly before the incident.

“I headed straight down to the beach for a surf, when I saw him flailing(挥动). We just swam straight out to him and kept him calm while the help came”.

The four men were taken to the life boat house to recover, without injuries.

61. What would be the best title for the text?

A.Three Men to Be Praised                  B Notorious Place for Surfers

C.Surfers Rescue Man Caught in Tide           D.Greg Popple-a Lucky Dog

62. The helicopter came up at the request of ________.

A.Greg Popple         B. Craig Evans        C. Robert Miles          D. a passer-by

63. About the incident, we know that ______.

A.Mr. Popple moved difficulty for loss of energy

B.The three men were badly injured

C.Mr. Popple’mum was also in the rescue team

D.Mr. Davies was going to work that morning

64. According to the text, what was the most important thing to do for the three men?

A.Keeping him farther away from the rocks.       B.Keeping Mr Popple swimming in the sea.

C.Asking him to have a good rest.               D.Keeping him floating everywhere.

65. What may the style of this passage be?

A.A story.          B. A news report.          C. A poster.              D. An advertisement.