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【单选题】
下列说法正确的是( )。
A.
化学键的类型有离子键、共价键、,其中离子键是由正、负离子的电性引力而结合,其他化学键中的结合力则不是电性的
B.
非金属元素原子之间形成的化学键必定是离子键
C.
离子键没有饱和性、方向性,因此任何离子周围可以吸引数目不定的异性离子
D.
共价分子的中心原子有几个轨道发生杂化,就形成几个能量相等的杂化轨道
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举一反三
【单选题】阅读选择题 1 中的阅读材料,完成此题。 3 . It is indicated in the text that __________.
A.
Indonesians are sensitive to password security
B.
young people tend to have secure passwords
C.
nag screens help little in password security
D.
passwords for credit cards are usually safe
【简答题】根据剖开物体的范围,可将剖视图分为 、 、 视图。
【单选题】What is the problem with the rug?
A.
Ms. Janet Perez feels it is too small.
B.
Ms. Janet Perez never ordered it.
C.
Ms. Janet Perez feels she was undercharged for it.
D.
Ms. Janet Perez ordered two but received one.
【简答题】根据剖开物体的范围,可将剖视图分为 、 、和 。
【单选题】听力原文: Janet's sister is a stewardess for a famous international airline, and Janet wants to become one too. Of course she is still too young. The minimum age for a stewardess is twenty and Janet is on...
A.
She hasn't graduated.
B.
She prefers to work in a travel agency.
C.
She isn't old enough.
D.
She cannot speak Spanish.
【单选题】剖视图中,根据剖开物体的范围可将剖视图分为全剖视图、半剖视图和()
A.
局部剖视图 ‍
B.
旋转剖视图
C.
阶梯剖视图
D.
断面图
【单选题】Janet works for a toy company called K Co. She telephones Mary at P Co on a daily basis to order parts. Janet has no contact with customers but does deal with complaint letters from D Group, an organi...
A.
Janet only
B.
Janet and Mary at P Co
C.
Janet and D Group
D.
Janet, Mary and D Group
【简答题】阅读短文。完成 7~9 题。 第 7 题 填入[ 1 ][ 2 ]中恰当的词语是( )。
【简答题】根据剖开物体的范围,可将剖视图分为 视图、 视图和 视图 。
【简答题】阅读短文。完成 111~115 题。 第 111 题 填入[1][2]中恰当的词语是( )。
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