中学化学中,常见无机物A、B、C、D、E、X、Y存在如下图转化关系(部分生成物和

题型:选择题

问题:

中学化学中,常见无机物A、B、C、D、E、X、Y存在如下图转化关系(部分生成物和反应条件略去)。

下列推断正确的是

A.若A是CaC2,X是H2O,则Y一定是溴水

B.若A是金属钠,X是H2O,则E一定能还原Fe2O3

C.若Y是NaOH,C是白色沉淀,则A与X一定发生置换反应

D.若Y是氧气,D是氧化物,则A与X一定发生氧化还原反应

考点:无机推断
题型:选择题

甲状腺腺瘤的最主要症状是()。

A.颈部肿物

B.气促

C.突眼

D.颈部疼痛

E.心悸

题型:选择题

已婚职工探望父母,每()年给假一次,假期为()天。

A.3;30

B.4;20

C.5;40

D.2;15

题型:选择题

下列是布匹的自述,其中包含化学性质的是(  )

A.我是由纤维加工形成的

B.我可以根据你的需要加工成各种款式的时装

C.我怕剪刀,它会把我变得支离破碎

D.我怕火,它会把我变成灰烬

题型:选择题

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B.let the readers know the OU Support Open Learning

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D.attract students to the Open University小题2:If you want to study in the Open University, you need ________.

A.a good study habit

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C.a willingness to learn

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题型:选择题

某企业接受委托代销商品,并根据所代销商品的数量向委托方收取手续费。下列各项中,属于受托方确认收入实现时间的是( )。

A.收到手续费时

B.取得代销商品时

C.销售代销商品时

D.向委托方开具代销清单时

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