【单选题】The students showed ____when solving the difficult maths problems.
【单选题】_____ at his knowledge, all the students showed their respect for their teacher.
【多选题】下列各项中,关于仲裁的特点,说法正确的有 ( ) 。
【单选题】染色体核型 46 ,XY , del 6q 表示
【单选题】______ at his knowledge, all the students showed their respect to their teacher.