当用网将留种用的草地罩上后，却发现草的叶子被害虫吃了很多，产_爱下问搜题

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问题单项选择题

当用网将留种用的草地罩上后，却发现草的叶子被害虫吃了很多，产生这种现象的原因是 ( )

A．环境污染

B．食物链被破坏

C．缺少光照

D．植被被破坏

答案

参考答案：B

完形填空

I graduated from a small public school in Michigan. One day，Mr. Ledy，our football coach，asked me to play football. I couldn’t help 36 ：me，play football? I was six feet tall and was not much __37__ a hundred pounds in weight. I thought that they might just need 38 fool to increase the number of the players. However，he was persistent(坚持的) and __39__I joined the football team. That 40 to be one of my best decisions as a kid.
Our worst game __41__ was the one against Crystal Falls. They beat us 56 to 6. Yeah! That was a football not a basketball _42__. We played them again when we were seniors. They __43__ us again but the score was much more _44_，30 to 20.
Coach Ledy would not let that __45__ again. He encouraged us to beat them，to pay them back. And we did so in the last game we played before __46__. I had scored 6 points alone in the game. Coach Ledy praised me. It was a huge _47 for me.
Was I a football hero? Ha! Ha! No，I couldn’t __48__ it without our team. The thing I learned through football was __49__. We won as a team and we __50__ as a team.
I think Mr. Ledy would be __51__ of me if he knew that I had broken the athletic __52__ at the University of Michigan. I’m __53__to him as I would not have today’s honor without him. I’ll __54__life’s final war with pain to win the victory；I’ll seek the lights of glory wholeheartedly and I’ll __55__ working hard so as not to let him down.

A．immediately

B．comfortable

D．contribution

单项选择题

企业生产的产品没有国家标准、行业标准和地方标准的，（）制定企业标准，作为组织生产的依据。

A、不可以

B、可以

C、应当

D、禁止