革命伤残军人按伤残性质可分为（）。
A、因战致残
B、因公致残
C、因病致残
参考答案：A, B, C
What ______ Ann's brother ______ be? [ ]
A. does; want to
B. does; want
C. does; wants
D. does; wants to
发现实验室楼的配电箱起火，可以用楼内的消火栓放水灭火。
