山东省潍坊市2021年中考化学试题(原卷版)
2021山东潍坊试题一、选择题(本题包括10小题,每小题2分,共20分。每小题只有一个选项符合题意)1.《天工开物》对钢铁冶炼过程有如下记载。有关说法正确的是A.“垦土拾锭”:铁元素是地壳中含量最高的金属元素B.“淘洗铁砂”:铁矿石(主要成分为Fe2O3)能溶于水C.“生熟炼铁”:冶炼铁过程中发生了化学变化D.“锤锻成钢”:生铁高温锻打成钢,碳元素含量升高2.下列实验操作正确的是A.氢气验纯B.二氧化碳验满C.浓硫酸稀释D.滴加液体3.2021年3月22日是第29个世界水日,今年的主题是“珍惜水、爱护水”。下列对于水的认识正确的是A.用废水浇灌农田以降低成本B.使用无磷洗涤剂减少水体污染C.利...
相关推荐
-
架构演进:小米的经验分享VIP免费
2025-03-31 14 -
Chemical Evolution of Fluorine in the Milky Way Kate A. Womack1Fiorenzo Vincenzo1Brad K. Gibson1Benoit Côté23Marco Pignatari3110
2025-09-29 3 -
Chemical evolution of elliptical galaxies I supernovae and AGN feedback Marta Molero12Francesca Matteucci123Luca Ciotti4
2025-09-29 2 -
CHAYAN KARMAKAR ABSTRACT . The aim of this paper is to give another proof of a theorem of D .Prasad
2025-09-29 3 -
Charge-sensing of a GeSi coreshell nanowire double quantum dot using a high-impedance superconducting resonator
2025-09-29 3 -
Charge uctuation and charge-resolved entanglement in a monitored quantum circuit with U1symmetry
2025-09-29 3 -
Character-level White-Box Adversarial Attacks against Transformers via Attachable Subwords Substitution
2025-09-29 4 -
Certifying randomness in quantum state collapse Liang-Liang Sun1Xingjian Zhang2Xiang-Zhou1Zheng-Da Li34
2025-09-29 3 -
CERTIFIED ROBUSTNESS OF QUANTUM CLASSIFIERS AGAINST ADVERSARIAL EXAMPLES THROUGH QUANTUM NOISE
2025-09-29 3 -
Certified machine learning Rigorous a posteriori error bounds for PDE defined PINNs
2025-09-29 2
作者详情
相关内容
-
Charge uctuation and charge-resolved entanglement in a monitored quantum circuit with U1symmetry
分类:图书资源
时间:2025-09-29
标签:无
格式:PDF
价格:10 玖币
-
Character-level White-Box Adversarial Attacks against Transformers via Attachable Subwords Substitution
分类:图书资源
时间:2025-09-29
标签:无
格式:PDF
价格:10 玖币
-
Certifying randomness in quantum state collapse Liang-Liang Sun1Xingjian Zhang2Xiang-Zhou1Zheng-Da Li34
分类:图书资源
时间:2025-09-29
标签:无
格式:PDF
价格:10 玖币
-
CERTIFIED ROBUSTNESS OF QUANTUM CLASSIFIERS AGAINST ADVERSARIAL EXAMPLES THROUGH QUANTUM NOISE
分类:图书资源
时间:2025-09-29
标签:无
格式:PDF
价格:10 玖币
-
Certified machine learning Rigorous a posteriori error bounds for PDE defined PINNs
分类:图书资源
时间:2025-09-29
标签:无
格式:PDF
价格:10 玖币


渝公网安备50010702506394