皮皮学，免费搜题
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【单选题】
关于染色,叙述 错误 的是
A.
室温越高，染色时间越短
B.
染液浓度越高，染色时间越短
C.
细胞数量越多，染色时间越长
D.
先倒去染液再用流水冲洗
E.
用缓慢的流水冲去染液
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【多选题】利用大型水生植物防治水体富营养化的基本原理有哪些?( )
A.
植物的光合作用
B.
植物的吸收作用
C.
植物根际微生物的作用
D.
超富集植物的富集作用
查看完整题目与答案
【单选题】下列说法不正确的是( )。
A.
水体富营养化定义：人为因素引起的湖泊、水库中氮增加对其水生生态产生不良的影响
B.
水体富营养化的主因是磷增加，同时也与氮含量、水温及水体特征有关
C.
土壤允许流失量定义：长时期内能保待土壤的肥力和维持土地生产力基本稳定的最大土壤流失量
D.
类比法定义：通过既有开发工程及其已显现的环境影响后果的调查结果来近似地分析说明拟建工程可能发生的环境影响
查看完整题目与答案
【单选题】某企业2015年2月14日为甲公司提供运输劳务开具了运输业增值税专用发票,应收取的运费为100万元,增值税11万元。为了提早收取劳务款而在合同中规定了现金折扣条件为:2/10,1/20,N/30(计算现金折扣时不考虑增值税)。甲公司在2015年2月28日支付上述款项,则该企业实际收到的金额为( )万元。
A.
111
B.
110
C.
109
D.
109.89
查看完整题目与答案
【单选题】某企业2015年2月14日为甲公司提供运输劳务开具了运输业增值税专用发票,应收取的运费为100万元,增值税11万元。为了提早收取劳务款而在合同中规定了现金折扣条件为:2/10,1/20,N/30(计算现金折扣时不考虑增值税)。甲公司在2015年2月28日支付上述款项,则该企业实际收到的金额为( )万元。
A.
111
B.
109
C.
110
D.
109.89
查看完整题目与答案
【单选题】There seems never to have been a civilization without toys, but when and how they developed is unknown. They probably came about just to five children something to do. In the ancient world, as is toda...
A.
their social roles are rigidly determined
B.
most boys would like to follow their fathers' professions
C.
boys like to play with their fathers while girls with their mothers
D.
they like challenging activities
查看完整题目与答案
【单选题】听力原文： There seems never to have been a civilization without toys, but when and how they developed is unknown. They probably came about just to give children something to do. In the ancient world, as t...
A.
Because boys and girls are being prepared for different social roles.
B.
Because boys are more courageous.
C.
Because toy makers want to diversify their products.
D.
Because parents have different expectations for boys and girls.
查看完整题目与答案
【多选题】本实验进行水体富营养化评价时测定的指标为()
A.
总 P
B.
叶绿素
C.
正磷酸盐
D.
叶绿素 a
E.
总 N
查看完整题目与答案
【判断题】电子商务中的每一笔交易,都包含着“四流”,即商流、信息流、资金流和物流。( )
A.
正确
B.
错误
查看完整题目与答案
【多选题】利用大型水生植物对防治水体富营养化的基本原理主要有哪些?( )
A.
植物光合作用
B.
植物的吸收作用
C.
植物根际微生物的作用
D.
超富集植物的富集作用
查看完整题目与答案
【单选题】There seems never to have been a civilization without toys, but when and how they developed is unknown. They probably came about just to give children something to do. In the ancient world, as is toda...
A.
their social roles are rigidly determined
B.
most boys would like to follow their fathers' professions
C.
boys like to play with their fathers while girls with their mothers
D.
they like challenging activities
查看完整题目与答案
相关题目：
【多选题】利用大型水生植物防治水体富营养化的基本原理有哪些?( )
A.
植物的光合作用
B.
植物的吸收作用
C.
植物根际微生物的作用
D.
超富集植物的富集作用
查看完整题目与答案
【单选题】下列说法不正确的是( )。
A.
水体富营养化定义：人为因素引起的湖泊、水库中氮增加对其水生生态产生不良的影响
B.
水体富营养化的主因是磷增加，同时也与氮含量、水温及水体特征有关
C.
土壤允许流失量定义：长时期内能保待土壤的肥力和维持土地生产力基本稳定的最大土壤流失量
D.
类比法定义：通过既有开发工程及其已显现的环境影响后果的调查结果来近似地分析说明拟建工程可能发生的环境影响
查看完整题目与答案
【单选题】某企业2015年2月14日为甲公司提供运输劳务开具了运输业增值税专用发票,应收取的运费为100万元,增值税11万元。为了提早收取劳务款而在合同中规定了现金折扣条件为:2/10,1/20,N/30(计算现金折扣时不考虑增值税)。甲公司在2015年2月28日支付上述款项,则该企业实际收到的金额为( )万元。
A.
111
B.
110
C.
109
D.
109.89
查看完整题目与答案
【单选题】某企业2015年2月14日为甲公司提供运输劳务开具了运输业增值税专用发票,应收取的运费为100万元,增值税11万元。为了提早收取劳务款而在合同中规定了现金折扣条件为:2/10,1/20,N/30(计算现金折扣时不考虑增值税)。甲公司在2015年2月28日支付上述款项,则该企业实际收到的金额为( )万元。
A.
111
B.
109
C.
110
D.
109.89
查看完整题目与答案
【单选题】There seems never to have been a civilization without toys, but when and how they developed is unknown. They probably came about just to five children something to do. In the ancient world, as is toda...
A.
their social roles are rigidly determined
B.
most boys would like to follow their fathers' professions
C.
boys like to play with their fathers while girls with their mothers
D.
they like challenging activities
查看完整题目与答案
【单选题】听力原文： There seems never to have been a civilization without toys, but when and how they developed is unknown. They probably came about just to give children something to do. In the ancient world, as t...
A.
Because boys and girls are being prepared for different social roles.
B.
Because boys are more courageous.
C.
Because toy makers want to diversify their products.
D.
Because parents have different expectations for boys and girls.
查看完整题目与答案
【多选题】本实验进行水体富营养化评价时测定的指标为()
A.
总 P
B.
叶绿素
C.
正磷酸盐
D.
叶绿素 a
E.
总 N
查看完整题目与答案
【判断题】电子商务中的每一笔交易,都包含着“四流”,即商流、信息流、资金流和物流。( )
A.
正确
B.
错误
查看完整题目与答案
【多选题】利用大型水生植物对防治水体富营养化的基本原理主要有哪些?( )
A.
植物光合作用
B.
植物的吸收作用
C.
植物根际微生物的作用
D.
超富集植物的富集作用
查看完整题目与答案
【单选题】There seems never to have been a civilization without toys, but when and how they developed is unknown. They probably came about just to give children something to do. In the ancient world, as is toda...
A.
their social roles are rigidly determined
B.
most boys would like to follow their fathers' professions
C.
boys like to play with their fathers while girls with their mothers
D.
they like challenging activities
查看完整题目与答案