【判断题】酸碱滴定管在装液前必须先用待装液荡洗。( )
【单选题】下列关于扫描仪工作原理的叙述,正确的顺序是( )。① 获得点的灰度值或色彩编码值;②将纸介质的图转换为一个数字信息阵列;③将图像变成一个点阵图形;④存入计算机的文件中使用相关软件进行显示和处理。
【单选题】Mr. Smith wants his children ______.
A.
to learn from Mr. Brown
B.
not to learn from Mr. Brown
C.
not to talk to Mr. Brown
【单选题】John was given the samesuitcase his father and grandfather ____ with them to school. 21
【判断题】Mr. Thrun and his group members built the first car to ever return from a DRAMA Grand Challenge with new software.