水平抛出一个物体，经时间t后物体速度方向与水平方向夹角为θ，重力加速度为g，则平抛物体的初速度为（　　）

一台电动机线圈的电阻为R，电动机正常工作时，两端电压为U，通过电流为I工作时间为t，下列说法正确的是（    ）

                           My Stay in New York

    After graduation from university, I had been unable to secure a permanent job in my small town. So I decided to leave home for New York,____I might have a better chance to find a good job. ____ (earn) some money to pay the daily expenses, I started work in a local café as a waiter. I believe that30．____ I was offered a good position, I would resign at once.

    Over time, the high cost of living became a little burden on my already  ____ (exhaust) shoulder. On the other hand, my search for a respectable job had not met with much success. As I had studied literature at university, I found it quite difficult to secure a suitable job in big companies. Mother had just said that ____ I want to have a better career advancement, I had to find work in the city. Perhaps ____my mother had told me was deeply rooted in my mind. I just did as she had expected.

    Soon I had lived in the city for over six months but I still did not like it. Apparently, I had difficulty____ (adapt) myself to life in the city, let alone finding a job to my delight. After nine months of frustration, I eventually decided to go back to my small town. Not until I returned ____I realize that a quiet town life was the best for me.

材料一  中国知识分子的绝大部分已经是工人阶级的一部分。

——1956年5月周恩来代表党中央作的《关于知识分子问题的报告》

材料二  “在某一医学上，生物学或其他自然科学学说上，贴上什么‘封建’‘资本主义’‘社会主义’‘无产阶级’‘资产阶级’之类的阶级标签……就是错误的。”……“只许写工农兵题材，只许写新社会，只许写新人物等，这种限制是不对的。”

“百花齐放、百家争鸣”，对批评工作者来说，就是批评的自由和反批评的自由，而现在的批评，有些令人害怕，应当纠正……文艺工作者和科学工作者要学习马克思列宁主义，以此来指导文学艺术创作和科学研究工作。

——1956年5月26日陆定一在关于知识分子问题会议上的讲话

某工厂采用电解法处理含铬废水，耐酸电解槽用铁板作阴、阳极，槽中盛放含铬废水，原理示意图如图，下列说法不正确的是（　　）