题目内容：
固步自封：抱残守缺：保守
参考答案：
答案解析：
单选题：固步自封：抱残守缺：保守
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The red flag looks extremely beautiful__________ the blue sk
The red flag looks extremely beautiful__________ the blue sky and white clouds.
①生命单体②原始水生物③生物大分子④简单有机物⑤地球生物圈
①生命单体②原始水生物③生物大分子④简单有机物⑤地球生物圈
听第10段材料，回答第题。What is the first thing Jeff wants to do now?
听第10段材料，回答第题。What is the first thing Jeff wants to do now?
What did Helen use a lot in high school?
What did Helen use a lot in high school?
How long did Helen do part-time jobs?
How long did Helen do part-time jobs?