【判断题】To a certain extent, China ’ s present export growth still relies on the input and consumptions of resources, energy, land, manpower, and environment, while the input of science and technology, manage...
【简答题】T he employee who checks in arriving guests and assigns them to their rooms is the receptionist. W hen the guest with a reservation arrives, the receptionist checks his reservation details with the gu...
【单选题】( 2018· 全国卷 II ) 在致癌因子的作用下,正常动物细胞可转变为癌细胞。有关癌细胞特点的叙述错误的是 ( ) A .细胞中可能发生单一基因突变,细胞间黏着性增加 B .细胞中可能发生多个基因突变,细胞的形态发生变化 C .细胞中的染色体可能受到损伤,细胞的增殖失去控制 D .细胞中遗传物质可能受到损伤,细胞表面糖蛋白减少