(1)下图甲中装置甲是某种不溶于水的气体X的发生装置和收集装置(必要时可以加热)

题型:实验题

问题:

(1)下图甲中装置甲是某种不溶于水的气体X的发生装置和收集装置(必要时可以加热),所用的试剂从下列试剂中选取2-3种:硫化亚铁、二氧化锰、铜屑、氯化铵、稀氨水、大理石、浓硫酸、浓硝酸、稀硝酸、蒸馏水。

回答下列问题:

①气体X的分子式是____________。

②所选择的药品a是_________,b是___________ , c是___________。

③下列装置乙和丙,能代替装置甲的简易装置是____________(填“乙”或“丙”)

④请写出在试管a中所发生反应的化学方程式_________________。

⑤从反应开始到反应结束,预期在试管a中可观察到的气体的实验现象有哪些,请依次逐步写出________________;___________________;

(2)在进行研究性学习的过程中,学生发现等质量的铜片分别与等质量均过量的浓硝酸或稀硝酸反应,所得到溶液前者呈绿色,后者呈蓝色,针对这种现象,学生进行了讨论,出现两种意见,一种认为:Cu2+浓度差异引起了这种现象,你认为_______(填“正确”或“不正确”),

依据是:_________________;

(3)另一种意见是:溶液呈绿色可能是Cu2+与NO2混合的结果,并用实验进行了证明,请简述实验方案与实验现象:__________________。

考点:设计实验方案及探究实验单质铜(浓、稀)硝酸其他物质的制备(硫酸铜晶体、铁红等)
题型:实验题

阅读理解。

      I got home at six o'clock in the evening. My mother opened the front door for me.

      "Good evening, Ted." she said. 

      "Good evening, Mum." I answered.

      "Aren't you happy?" she asked.

      "Yes," I answered. "I'm happy, but I'm very hungry."

      "Supper will be ready in half an hour." she said.

      I took off my coat and sat down. My mother sat next to me.

      "Did you catch your train this morning?" she asked.

      "Yes," I answered. "I ran all the way to the station and got there at half past seven."

      "Which train did you catch?"

      "The 7: 40."

      "What time did you get to school?" she asked again.

      "At 8: 05." I answered. "Wasn't the teacher angry?" 

      "No. He wasn't in the classroom. He was late, too. He sat in front of me on the train."

1. At six o'clock in the evening Ted ______. [ ]

A. was back from home

B. left school

C. ran to the station

D. came back from school

2. What time did Ted take the train this morning? [ ]

A. 6:30.

B. 7:40.

C. 8:05.

D. 6:00.

3. How far was it from the station to the school?[ ]

A. Twenty minutes by bike.

B. Half an hour's walk.

C. Two kilometers.

D. Twenty-five minutes by train.

4. How did Ted's teacher go to work? [ ]

A. By bus.

B. In his car.

C. By train.

D. On foot.

5. Why was Ted's teacher late this morning? [ ]

A. Because he didn't ride his bike.

B. Because he got up late.

C. Because he sat in front of Ted.

D. We don't know.

题型:实验题

一条远期利率协议(FRA)的市场报价信息为“7月13日美元FRA69M8.2%8.07%”,其含义是()。

A.8.02%是银行的买价,若与询价方成交,则意味着银行在结算日支付8.02%利率给询价方,并从询价方收取参照利率。

B.8.02%是银行的卖价,若与询价方成交,则意味着银行在结算日从询价方收取8.02%利率,并支付参照利率给询价方

C.8.07%是银行的卖价,若与询价方成交,则意味着银行在结算日从询价方处取8.07%利率,并支付参照利率给询价方

D.8.07%是银行的买价,若与询价方成交,则意味着银行在结算日支付8.07%利率给询价方,并从询价方收取参照利率

题型:实验题

胫骨上1/3骨折易造成

A.创伤性关节炎
B.骨筋膜室综合征
C.缺血性骨坏死
D.损伤性骨化

题型:实验题

最小有作用剂量是()。

A.一种化合物按一定方式与人接触,出现了亚临床症状的最小剂量

B.一种化合物按一定方式与人接触,引起免疫功能减低的最小剂量

C.一种化合物按一定方式与人接触,造成显微镜下可观察到的损伤的最小剂量

D.一种化合物在一定时间内,按一定方式与机体接触,使某项指标开始出现异常变化的最低剂量

E.DNA大段损伤的最小剂量

题型:实验题

消费者消费行为的基础是()

A.消费环境

B.消费活动

C.消费过程

D.消费心理

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