对于《地表水环境质量标准》的Ⅲ类标准中对于COD的要求是( )ms/L。
A.15
B.20
C.30
D.40
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APP具体操作流程为:
用所给动词的正确形式填空。
1. Listen! They _____ (talk) about our new teacher.
2. Mr. Li _____ (take) us to a very beautiful country soon.
3. Betty is good at _____ (draw) very much.
4. He spent a lot of time _____ (do) his homework everyday.
5. If it is fine tomorrow, I _____ (go) with you.
6. He often helps others, and _____ (do) a lot of hard work for the club.
7. He left the room without _____ (say) a word.
8. Elsa put the can in a box and _____ (run) away.
下列各组物质,按化合物、单质、混合物顺序排列的是( )
A.生石灰、白磷、熟石灰
B.烧碱、液态氧、碘酒
C.干冰、铁、硫酸
D.盐酸、氮气、胆矾
禾谷类作物发芽势时间为()天
注册会计师在评估企业流程的复杂度时,可以考虑的因素有( )。
A.流程需要对信息进行手工处理
B.对系统生成的报告的依赖程度
C.数据是否通过网络传输
D.流程涉及大量操作及决策活动
安健环管理体系中,安健环理念的内容应体现()
A.企业价值观
B.企业未来发展的愿景
C.企业效益
D.安健环目标