【单选题】实验完成后,剪掉的动物皮毛如何处理
C.
和动物尸体一同放入指定垃圾桶内,统一焚烧处理
【判断题】由于激光器发出的激光耦合到光纤中去的功率高,所以传输距离远。()
【单选题】列表a=[2, 4, 6, 8, 10, 12, 14],则a[3 : 0 : -1]切出的结果是什么?
【简答题】CO 2 激光器发出的激光波长为10.6μm。
【简答题】-2, -4, 6, 8, -10,-12, 14, 16,( ),( ) A.-17,-18 B.17,18 C.-18,-20 D.18,20
【单选题】When the boy realized that he was two hours late, he _________.
A.
knew his father would not let him drive again
B.
told his father a lie to avoid being criticized
C.
regretted going to the movie theater
D.
knew he had to apologize to his father for keeping him waiting