一朵桃花的（  ）结构被虫吃掉，这朵花就完全不可能结出桃子。    

    Everyone wants to be successful. But failure is a common(普通的) thing for us to meet with.

    1, sometimes we fail the exams, sometimes in the sports meet, others 2 but we fail. So3 everybody meets with the failure in his life.

    However, different people have different4 to deal with the failure. Some people lose hope when they fail. They seem to think that it is the 5 of the world. Others, on the other hand, don't take failure 6. They seem to think that failure is the first step(步骤) to success. They will keep up and try their best7 the final success.

    Now let's imagine (猜想) the ends of the two ways. If we are afraid of the failure and always feel8, and don't try our best to change ourselves, we may meet with more and more failures. But as long as we are hopeful and brave to face them, and never give up, we will 9  successful and our dreams will come true some day.

    So, please remember: Life doesn't give us the pleasure we want. But if we never give up and10 do little by little, it will make a big difference.

中国．英国及俄罗斯等世界上大多数国家，常用频率为50 Hz的交流电，产生这样交流电的交流发电机转子的转速为____r/min．

近年来，我国新能源汽车产业在高额补贴政策刺激下获得了快速发展，但长期执行容易使企业患上依赖症。鉴于此，我国将对新能源汽车补贴政策进行调整完善，提高补贴门槛，突出对优势企业的支持，逐年下降补贴比例直至完全退出。这一调整(     )

①是运用行政手段加强宏观调控   

②有利于提升企业的技术研发动力

③有利于提高财政资金使用效率   

④是遏制行业盲目扩张的根本举措