儿童发生维生素D和钙缺乏会导致()。
参考答案:佝偻病
28. ____, he sometimes makes mistakes.
A.Though he is careful teacher
B.As he is careful
C.A careful teacher as he is
D.Being a careful teacher
每一个公民都要增强爱军拥军意识,正如()指出的:“军民团结如一人,试看天下谁能敌。”
A、毛 * *
B、周恩来
C、朱德