晶界

题型:名词解释

问题:

晶界

考点:材料科学基础材料科学基础题库
题型:名词解释
已知
a
b
均为单位向量,它们的夹角为60°,那么|
a
+3
b
|等于______.
题型:名词解释

文中共有10处语言错误,每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏词符号(∧),并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一个横线,并在该词下面写出修改后的词。  

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从十一处起)不计分。

Li Hua and I were neighboures and we went to same school. We always went to school together. We were good friend and had a great deal to share with every day. However, one day, Li Hua copied my homework, which made me such angry that I did not want to be friends with him any long. Then on Monday morning I ran downstairs without realize it was raining, but there was no time to return home to fetch an umbrella. It happens that Li Hua was just around the corner and be offered to share her umbrella with me. He made apology to me in a gently voice. I forgave him but gave him a hug.

题型:名词解释

影响价格的建筑物的自身因素有( )。

A.面积、结构、材料

B.临街状况

C.建筑物的年代

D.朝向、楼层、建筑物外观

E.设计、设备和施工质量

题型:名词解释

温度对酶作用的影响是双重的:①()②()。

题型:名词解释

在SQL语言中,允许获得某种权限的用户把这种权限再转授给其他用户,可以在GRANT语句中指定______子句。

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