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It is necessary that he ______ in time to attend the meeting. [ ]
1年前
The mother didn't know___________ is to blame for the broken glass as it happened while she was out.
1年前
学校组织学生参观屈原祠,上午去参观的有670人,下午分3批去参观,每批136人.这一天去参观的学生有多少人?
1年前
1年前
近视眼只能看清楚______的物体,看不清楚______的物体,这是因为近视眼的成像成在了视网膜之______,应给他配______透镜矫正视力.
1年前