【判断题】某质点沿x轴作直线运动,其运动学方程为x=3t - 4t 3 (SI),则该质点作匀变速直线运动,加速度沿x轴负方向.
【单选题】甲工厂与乙工厂签订了一份购销合同,约定如果甲工厂提供的产品不符合质量要求,则工厂有权在6个月内向人民法院提起诉讼,这是一种合同约定的诉讼时效。 ( )
【简答题】Jack Brown made a nice talking machine. It could weigh people’s weight. He wanted to try the machine before he could make a lot of them. He put the machine into the waiting room of a station. There we...
【单选题】可用于预防婴幼儿患巨幼红细胞性贫血的维生素是()。
【单选题】某质点沿x轴作直线运动,其运动学方程为【图片】 (SI),则该质点作 。
【多选题】可用于预防婴幼儿患巨幼红细胞性贫血的维生素是( )。
【单选题】某质点沿x轴作直线运动,其运动学方程为【图片】(SI),则该质点作 。
【简答题】如果在交付或开始使用后发现产品不符合“顾客规定的要求”(7.2.1a),GB/T19001:2008标准是否要求组织一定将不符合的产品告知顾客?
【简答题】Using inversion: There was a sudden gust of wind and his hat went away. 72. Rewriting the second sentence by using a cohesive device: The child doesn’t like this book. Show him a more interesting book...