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【单选题】
用K 2 Cr 2 O 7 法测定铁矿石中含量时，铁矿石一般用（）加热溶解。A.
硫酸
B.
硝酸
C.
氢氧化钠
D.
盐酸
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反馈参考答案：
举一反三
【单选题】直肠肛管疾病术前护理何项不妥
A.
术前三日可服用肠道抗生素
B.
术前一日中餐进少渣软食
C.
术前一日晚餐进流质饮食
D.
便后温热水坐浴
E.
术前晚及术晨各清洁灌肠一次
【单选题】Large companies promote secretaries more often than small companies do.
A.
Right
B.
Wrong
C.
Doesn't say
【简答题】A new high-performance contact lens under development will not only correct ordinary vision defects ______(而且还可以提高正常的夜间视力) as much as five times.
【简答题】Define “high-contact service.”
【简答题】According to the passage, companies often look for IT managers from ________. (A) non-computer technicians (B) their own professionals (C) other companies (D) another country
【单选题】Large companies promote secretaries more often than small companies do,
A.
Right
B.
Wrong
C.
Doesn't say
【单选题】Which one of the following is not the characteristic of high-contact cultures?
A.
Stand closer together
B.
Engage in less eye contact
C.
Touch more frequently
D.
Speak more loudly
【单选题】在一条河流取样垂线上，在水深大于1m时，取样点距水面不应小于（），距河底也不应小于（）
A.
0.3m ，0.3m
B.
0.5m ，0.3m
C.
0.5m ，0.5m
D.
0.3m ，0.5m
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