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Jellyfish and Crocodiles(水母和鳄鱼)

    Hi, my name's Ben. My family, that's Mum, Dad and me, live in Broome in Western Australia. Western Australia is about 80 times larger than Italy, but only 1.5 million people live there. ____ It has a population of about 12,000. It’s right on the coast and is known for its famous Cable Beach, which is 20km long.

    We live in the town in a house with a large garden. ____ We drive to Cable Beach and look for a quiet place to swim or to fish. We don't go swimming from October to March because there may be box jellyfish in the water. The box jellyfish is one of the most dangerous jellyfish. ____ If you are attacked by one, the best thing to do is to pour vinegar(醋)over the area of your body where you are hurt. That's why we always take a bottle of vinegar with us.

     ____ A year ago I went camping in the bush with my friend Bill and his dad. We wanted to do some fishing and set up camp about 20 metres from a river. ____ Bill's father told us to get up and we quickly got out of the tent and ran to the car, which was only 10 metres away.

    Bill's dad started the car and turned on the head

A.lights. In the light, we could see a big crocodile pulling the tent into the river!

B.In Australia, they kill up to 65 people a year.

C.Broome is a town in the north of Western Australia.

D.Another dangerous animal in Western Australia is the saltwater crocodile.

E.At weekends I often go fishing or swimming with my friends or my parents.

F.Suddenly, at 3 o’clock in the morning, we felt something pulling on our tent.


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答案(点此获取答案解析)

B,D,A,C,E

同类题2

妊娠期糖尿病对母亲和胎儿的巨大危害已引起人们的高度重视,其预防、诊断及治疗已成为当今研究的热点.请分析以下材料并回答问题:

材料一:“性激素结合球蛋白”(SHBG)是由肝脏合成并分泌的一种糖蛋白,能特异性结合并转运性激素.

材料二:胰岛素抵抗是指胰岛素含量正常而靶器官对其敏感性低于正常的一种状态,这是妊娠期一种正常的生理性抵抗.此现象随孕周增加而加重,为代偿下降的胰岛素敏感性,其分泌量也相应增加(用“”表示).尽管所有孕妇在妊娠期都有上述调节过程,但少数人却发生胰岛B细胞分泌功能衰竭而使血糖升高,导致妊娠期糖尿病发生.

(1)细胞中合成性激素的细胞器是____ .参与肝细胞合成SHBG过程的RNA有____  .

(2)器官甲是____.“器官甲→垂体→器官乙→雌激素”的过程体现了雌激素分泌的____  调节.“器官甲→胰腺→血糖”过程的调节方式为____

(3)SHBG的分泌过程中,雌激素与胰岛素表现为____作用.

(4)雌激素水平升高使胰岛素靶器官对胰岛素敏感性下降,表现为组织细胞吸收利用葡萄糖的量 ____ (增加、减少),对肝脏中糖原分解为葡萄糖的抑制____(增强、减弱).

(5)正常的生理性胰岛素抵抗有利于胎儿在发育中利用____  .研究表明SHBG含量____  (高、低)是由于胰岛素抵抗最终造成的结果.