问题 选择题

在发育过程中,果蝇比蝗虫多出的阶段是(  )

A.卵

B.幼虫

C.蛹

D.成虫

答案

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.

不完全变态发育: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:蜻蜓、蟑螂、蝼蛄、蟋蟀、蝗虫等.

所以在发育过程中,果蝇比蝗虫多出的阶段是蛹.

故选:C.

完形填空
One sunny afternoon, a seven-year-old girl went for a walk. She crossed a large area of grassland into the woods __   __ she realized that she was lost.
Sitting on a rock and __  __ what to do, she began crying.  After a while,she__  __ to walk along a path with tall trees and thick bushes. When it was getting dark, she saw a small, dark wooden house. She opened the door and __  __ entered. Suddenly, she heard a strange noise, and she ran out of the door and back to the __  __. Cold and tired, she fell asleep near a stream(小溪).
The girl’s parents were out and her dog, Laddy, was at home. Laddy sensed that his mistress(女主人)was in danger. He jumped __  __ a window, breaking the glass. He looked in the fields. But he couldn’t find his mistress anywhere. However, from the ground came a __   __ scent (气味) as he lowered his head. He __  __ the scent and walked across the grassland. Barking __   __ into the air, the dog __  __ through the woods until he found the __  __. But the girl was not there, so he headed back to the woods. Much to his delight, he saw his mistress’ blue shirt in the distance. He __  __ over some bushes and saw the little stream, where the girl was __   __.
When she opened her eyes and       her dog standing beside her, the girl said, “you      me, Laddy,” and she kissed him several times. Seeing their daughter and dog coming back, the parents were happy. That night Laddy had a hero’s supper: a huge meal of pork.
小题1:
A.beforeB.sinceC.whileD.as
小题2:
A.wonderingB.forgettingC.rememberingD.repeating
小题3:
A.preferredB.refusedC.failedD.decided
小题4:
A.carelesslyB.carefully C.hopelesslyD.unwillingly
小题5:
A.treesB.bushesC.woods D.grasses
小题6:
A.atB.throughC.inD.onto
小题7:
A.terribleB.strangeC.pleasant D.familiar
小题8:
A.missedB.discoveredC.followed D.noticed
小题9:
A.calmlyB.loudly C.happilyD.gently
小题10:
A.searchedB.foundC.lookedD.travelled
小题11:
A.windowB.girl C.houseD.hero
小题12:
A.jumped B.climbedC.walkedD.flew
小题13:
A.awake B.afraidC.availableD.asleep[
小题14:
A.listenedB.watchedC.heardD.saw
小题15:
A.disturbedB.comfortedC.savedD.scared
判断题