题目内容

Everyone has periods in their lives__________everything seems so hard.

A. when
B. where
C. which
D. that

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地市公司根据省公司生产技术部门批复的状态检修综合报告启动()编制工作。

Inthe__________half of the 17th century those cities became even more prosperous.

A. latter
B. latest
C. later
D. late

患先天性丙种球蛋白缺陷病的病儿,什么时期最易发生反复严重的细菌感染()

A. 新生儿期
B. 出生后半年内
C. 1~2岁
D. 小学生年龄组
E. 中、青年年龄组

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