大部分装卸搬运机械的机动性均较好。_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题判断题

大部分装卸搬运机械的机动性均较好。

答案

参考答案：错

解析：大部分装卸搬运机械的机动性较差。

完形填空

Last fall I put a bird feeder outside my window. I thought as soon as I hung up, a great ___16____ beautiful birds would come. Days, weeks and months went by; ____17____, no birds.
I asked many people, why? What was I doing ___18____? “Nothing,” most of them replied. “Just ____19____.” So I waited, waited and waited.
I ____20____ off the deck （露台）, I changed the feed, I ___21____ the feeders, and I ____22____ made the cat go out the other door! But ____23___ seemed to work. So --- I waited, “with patience and hope. ”
Two months later, early in the morning, I was ____24____. A beautiful bird had been on the bird feeder. All of a sudden, I saw hundreds upon hundreds of birds____25____ from everywhere.
____26____ a beautiful lesson this living thing taught me! “Patience and hope” will ____27____ the most beautiful things in life.
So I keep hoping and waiting, waiting and ___28____. I will try to use this “little lesson” in ____29____ many other things in my life. I guess, “____30____ is a virtue （美德）” after all.

C．volunteering

判断题

短期平均成本曲线呈U字形的原因是边际效益递减规律造成的。