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【简答题】
Arabic language is one of the world's most widely used languages. it is the officer language of many arab nations in the middle east and northern africa.(1)____ there are two types of arabic, spoken and written spoken arabic comprises of dialects ill different areas of the arabic-speaking world.(2)____these dialects can be rough divided into gulf, iraqi, levantine, maghrebi, north egyptian, saudi, south egyptian and sudanase and tunisian.(3)____ these dialect areas can be subdivided farther.(4)____ written arabic serves as the standard written language of all arab nations. it is the descendant of the language of the quran, the scared book of the islamic religion.(5)____ arabs use a spoken form of written arabic for radio and tv news broadcasts, and in plays and motion pictures. this form also serves as a common spoken language for arabs who speaks different dialects. arabic belongs to the semitic language groups, and is thus related to hebrew and ethiopic.(6)____ the arabic alphabet has 28 symbols. the alphabet is written from right to left or from the top of the page to the bottom. the alphabet appears in the aiphabet article. No one knows when arabic originally developed, and people of the arabian peninsula were the first use it. during the ad.(7)____(8)____ 600s, islam spread throughout south western asia and northern africa, and the arabic language was introduced in these areas. since the mid-1900s, many arab countries have played increasingly important role in world affairs.(9)____ in a result, arabic has become a major language in international business and politics.(10)____
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【简答题】12 填空 is the predominant alloying element of Brass.
【单选题】 Manganese as an alloying element in alloy steels is used principally to
A.
Improve hardenability
B.
Improve mechanical properties at low or elevated temperatures
C.
Improve the corrosion and oxidation resistance
D.
Increase the machinability
【简答题】Describe the mechanisms by which alloying effects affect hardenability.
【判断题】坑边堆土要防坍塌,应及时清运;堆土在坑边0.8m以外,堆土高度≯1.5m。
A.
正确
B.
错误
【单选题】( )是人们在社会交往中由于受历史传统、风俗习惯、宗教信仰、时代潮流等因素的影响而形成,既为人们所认同,又为人们所遵守的。
A.
仪式
B.
礼节
C.
礼貌
D.
礼仪
【判断题】生料易烧性好;熟料容易形成。
A.
正确
B.
错误
【简答题】With the exception of , all alloying elements raise the hardenability of steels..
【多选题】日本的风物特产主要有( )。(题库2016、2017、2018)
A.
和服
B.
版画
C.
京都油纸伞
D.
竹编工艺品
E.
螺细漆器制品
【单选题】( )是人们在社会交往中由于受历史传统、风俗习惯、宗教信仰、时代潮流等因素的影响而形成,既为人们所认同,又为人们所遵守的。
A.
礼仪
B.
礼节
C.
礼貌
【简答题】Some alloying elements are known a‘carbide formers’.What does this term mean?Beyond this,some elements are called very strong,strong or moderate carbide formers.What is meant by this?
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