单项选择题Why did Jeff Bezons choose Amazon to be the name of his store? A. He wished his store would be the biggest store in the world just like the Amazon river is the longest river in the world. B. He liked the pronounciation of the word Amazon. C. He chose the word Amazon accidentally.
单项选择题隐框或半隐框玻璃幕墙的玻璃面板与其周边铝合金框架之间应采用下列哪种材料进行粘结?
多项选择题翼型对流场产生小扰动的条件有( ) A、相对厚度比较小 B、相对弯度比较小 C、弦长比较小 D、来流迎角比较小
单项选择题长期进行灵巧性运动训练,维生素A的补充应不低于( )。 A. 1400ugRC B. 1600ugRC C. 1800ugRC D. 2000ugRC
单项选择题轿车轮胎磨损后花纹深度应大于()mm。 A. 0.8 B. 1.6 C. 3.2 D. 4