Is that man your teacher? [ ]
A. Yes, he is.
B. Yes, she is.
C. No, she isn't.
答案:A
血红素合成障碍所致的贫血是( )。
A.缺铁性贫血B.再生障碍性贫血C.海洋性贫血D.巨幼细胞贫血E.慢性病贫血
利用NBDP向有关海岸台播发本船加入船舶自动互助系统所发的信息使用的指令是:()
A.HELP+
B.OPR+
C.FREQ+
D.AWV+