题干

夏季,草原上雨量充沛时草很茂盛,野兔数量会增加,草被吃掉过多,但过一段时间,野兔数量又会下降,草又多起来。因为

A:草太少,野兔跑掉了

B:草大量减少,野兔被饿死

C:生态系统有自动调节能力

D:草比原来长的快

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答案(点此获取答案解析)

C

同类题1

阅读理解

SM Card Cutter

Change regular SM cards to smaller SIM cards.

    Did you know you can cut a regular size phone SIM card to a smaller size SM card and it will still work?This tool will help you do it.Just stick a SIM card in it,press it down like a stapler(订书机).A perfectly shaped smaller SIM is there.I've used it many times when swapping SIMs from one phone to another.

03/7/17-Mark Frauenfelder

Profi Cheese Slicer

    Uses a thin wire to slice up to medium-hard cheeses in four inch sections.

    I may own every cheese slicer ever made.I prefer a wire type cheese cutter so I can cut slices that work well on a piece of bread and sandwich.

    This cheese slicer is great for both tasks.It even has adjustable tension on the two cutting wires.A point of information: I did break a wire cutting a very hard piece of cheese with black pepper.Good news,the wire is replaceable,and I was able to purchase new wires to fix it.Maybe best to use on softer cheeses.Lessons learned.But, highly recommended for every other use except for those extremely hard cheeses.

03/6/17-Kent Bames

Ash Bucket(桶子)

Bucket with lid keeps your fireplace(壁炉)clear of ashes.

    I purchased this ash bucket recommended by my friend and have found it invaluable.Previously I had an old bucket that got left outside and usually filled up with rain and became a mess to clean.This ash bucket has a raised bottom and thermal insulation(隔热层)to prevent any accidental hot coals in your ash to damage your floor or cause a fire.You can store this bucket indoors since the lid is nice and tight.

03/3/17-Seth Wilson

同类题4

阅读下列短文,从每题所给的A、B、C和D项中,选出最佳选项。

I remember, as a kid I had questioned Mom “Why doesn’t Dad love me!” Mom frowned. “Who said he doesn’t love you!” “Well, he never tells me,” I complained. “He never tells me either,”she said, smiling. “But look how hard he works to take care of us, to buy us food and clothes, and to pay for this house. That’s how your father tells us he loves us.”

After Mom died, I began visiting Dad every morning before I went to work. He was frail and moved slowly, but he always had a glass of freshly squeezed orange juice for me. Such a gesture, I knew, was as far as Dad had ever been able to go in expressing his love. Every time after drinking the juice, I walked over, hugged him and said, “I love you, Dad.” My father never told me how he felt about my hugs, and there was never any expression on his face when I gave them.

Then one morning, pressed for time, I drank my juice and made for the door. Dad stepped in front of me and asked, “Well!” “Well what?”I asked, knowing exactly what. “Well!” he repeated, looking everywhere but at me. I hugged him extra hard. It was the right time to say what I’d always wanted to. “I’m fifty years old, Dad, and you’ve never told me you love me.” My father stepped away from me. He picked up the empty juice glass, washed it and put it away. “You’ve told other people you love me.” I said, “but I’ve never heard it from you.” Dad looked very uncomfortable. I moved closer to him. “Dad, I want you to tell me you love me.” Dad took a step back, his lips pressed together. He seemed about to speak, and then shook his head. “Tell me”, I shouted. “All right I love you,” Dad finally blurted. His eyes watered, then overflowed.

I stood before him, stunned and silent. My father loved me so much that just saying so made him weep. Mom had been right. Every day of my life Dad had told me how much he loved me by what he did and what he gave. “I know, Dad,” I said. “I know.” And now at last I did.