海带中含碘元素。从海带中提取碘有如下步骤:①通入适量的Cl2②将海带焙烧成灰后加

题型:选择题

问题:

海带中含碘元素。从海带中提取碘有如下步骤:①通入适量的Cl2②将海带焙烧成灰后加水溶解③加CCl4振荡④用分液漏斗分液⑤过滤⑥蒸馏,则正确的操作顺序是(    )                                                                                         

A.①②③④⑤⑥

B.②⑤①③④⑥

C.①③⑤②④

D.②①③⑥⑤④

考点:设计实验方案及探究实验
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下列属于会计软件的配备方式的是()。

A、购买通用会计软件

B、自行开发

C、委托外部单位开发

D、企业与外部单位联合开发

题型:选择题

The nervous-looking young man had waited for a few moments—outside the jeweler’s before he got enough courage to enter. He was warmly greeted by a young assistant. James felt a rush of blood to his face as he explained he would be bringing in his future wife to choose a birthday present. The assistant listened carefully and told him he’d better buy a necklace. He wasn’t used to buying jewellery and was a little worried about over-spending. After some discussion as to a reasonable price and the type, the assistant showed him dozens of necklaces and helped him to choose. At last James chose one and left the shop promising to return at five o’clock. When, half an hour later than planned, James did return to the shop with his future wife, Laura, the assistant acted as if she had never seen him before. When she was asked to show them some necklaces, she first brought out some inexpensive ones for them to choose, and then gave them the one she had prepared. A choice was soon made and they went away satisfied. James would certainly come back to buy what he wanted.

52. A good title for this passage is________.

A. A Clever Assistant                 B. Buying a Birthday Present

C. How to Choose a Necklace          D. A Brave Young Man

53.The word “overspending” in this passage means__________.

A. spending too much money

B. spending too much time

C. spending more time than he planned

D. spending too much time and too much money

54. When James told the assistant why he wanted to buy a present, his face_______.

A. turned pale                   B. turned  red       C. turned yellow                 D. turned black

55. James and Laura reached the shop at        .

A. 4:30       B.5:00         C.5:30         D.6:00

56. James would come back to buy what he wanted because_______.

A. the assistant knew how to satisfy the people who came to buy things

B. the necklace was good

C. Laura liked the necklace

D. the assistant who served James was very beautiful

题型:选择题

轴和孔的最小间隙时指()。

A、孔的下偏差与轴的上偏差之差

B、孔的上偏差与轴的下偏差之差

C、孔的实际尺寸与轴的实际尺寸之差

题型:选择题

______的长诗《荒原》是西方现代主义诗歌的代表作。( )

A.艾略特

B.惠特曼

C.波德莱尔

D.萨特

题型:选择题

社会主义社会的最终目标和结果是( )。

A.解放和发展生产力

B.消灭剥削和消除两极分化

C.实现按需分配

D.共同富裕

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