我国通常用煤的坚固性系数f(又称普式系数)来表征煤破碎的难易程度,当f=1.5--3

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我国通常用煤的坚固性系数f(又称普式系数)来表征煤破碎的难易程度,当f=1.5--3.0时的煤为()。

考点:采煤机司机考试采煤机司机考试题库
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患者,男,65岁缺失,口内余牙情况良好,咬合关系正常,设计舌杆,牙槽嵴有倒凹安放位置是()。

A.与黏膜轻轻接触

B.位于非倒凹区

C.位于倒凹区

D.根据义齿设计类型决定

E.与黏膜只有0.5mm间隙

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D


Any mistake made in the printing of a stamp raises its value. A mistake on one inexpensive postage stamp has made the stamp worth a million and a half times its original (本来的) value. The mistake was made more than a hundred years ago in the British colony (殖民地)of Mauritius, a small island in the Indian Ocean. In 1847 an order for stamps was sent to a London printer—Mauritius was to become the fourth country in the world to issue (发行) stamps.
Before the order was delivered(传达), a party was planned at Mauritius’Government House, and stamps were needed to send out the invitations. A local printer was told to copy the design for the stamps. He printed the words " Post Office " instead of " Post Paid " by mistake on the several hundred stamps that he printed.
Today there are only twenty-six of these misprinted stamps left—fourteen Onepenny Orangereds and twelve Twopenny Blues. Because of the Twopenny Blue’s rareness (稀少) and age, collectors have paid as much as $ 16800 for it.

The mistakes on the locally printed postage stamps was in the ______.

A.size

B.words

C.price

D.colour

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患儿,男,6岁,以急性肾炎收入院,目前水肿消退,血压正常,肉眼血尿消失。此时护士应进行哪项健康教育

A.应当绝对卧床休息
B.在室内轻微活动
C.恢复上学
D.恢复体育活动
E.适当参加劳动

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()属于人体结构和形态的主要特征。

A.头颅

B.胸廊

C.骨盆

D.脊柱

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卫生行政复议

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