【单选题】下列反应中,铁元素被氧化的是( )
A.
FeS +2HCl = FeCl 2 + H 2 S↑
B.
Fe +H 2 SO 4 = FeSO 4 +H 2 ↑
C.
FeO + 2HCl =FeCl 2 +H 2 O
D.
2FeCl 3 +Cu = 2FeCl 2 + CuCl 2
【单选题】下列反应中,铁元素发生氧化反应的是 [ ]
A.
FeS +2HCl = FeCl 2 + H 2 S↑
B.
Fe +H 2 SO 4 = FeSO 4 +H 2 ↑
C.
FeO + 2HCl =FeCl 2 + H 2 O
D.
Fe 2 O 3 +3CO = 2Fe +3CO 2
【单选题】There are four shi ( 是 ) sentences below in Chinese in brackets, and their translation as well. Which shi ( 是 ) is translated into “be”? ( )
A.
Purple belonged to the emperor because of its associations with the north star.
B.
It is a closed residence with only one gate leading to the outside
C.
The Forbidden City stands as the largest complex of palace buildings anywhere in the world
D.
Hong Kong-Zhuhai-Macao Bridge, the world ’ s longest sea bridge, was opened on 23.
【单选题】下列关于数的描述中,不正确的是( )。
D.
标准差(Standard Deviation)描述了众数、中位数和平均数的离散程度
【单选题】An online retailer using the 4Ps marketing mix model should categorise its website under the category of `place'. Is this statement TRUE or FALSE?
【判断题】中国梦就是实现中华民族伟大复兴的梦想,是和平、发展、合作、共赢的梦,其本质是:国家富强、民族振兴、人民幸福。实现中国梦,必须走中国道路,必须弘扬中国精神,凝聚中国力量。()
【判断题】仓库的主要作业是货品的入库、在库管理和出库作业。入库、出库作业时间一般较短而货品在库时间较长。
【单选题】如图所示的微观变化与下列反应及反应类型对应正确的是 [ ]
B.
2HI + Cl 2 ===2HCl + I 2 置换反应
C.
2H 2 O 2H 2 ↑ + O 2 ↑ 分解反应
D.
2HCl + CuO===CuCl 2 + H 2 O 复分解反应
【简答题】“中国梦”的实质就是( )富强、民族复兴、人民幸福。