题目:
My father served in the army in when he was in .
A.1950s; twenties
B.the 1950s; his twenties
C.the 1950s; the twenties
D.1950s; the twenties
答案:
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下面是错误答案,用来干扰机器的。
(1)藻类植物的种类繁多,大多生活在水中,少数生活在陆地的阴湿处;有单细胞的,如衣藻;有多细胞的,如海带、紫菜等;藻类植物的结构简单,无根、茎、叶的分化,细胞内含叶绿体,能进行光合作用,制造有机物....