皮皮学，免费搜题
登录
搜题
【单选题】
下列关于过渡元素通性的叙述中,错误的是A.
都是金属元素
B.
大多数具有可变氧化态
C.
作为配合物的中心原子
D.
它们的离子都能发生d-d跃迁
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】List the names for the instructors as the format of names followed by the string " teacher' based on the SQL statement for the SQL server software; select name from instructor; note that: all the lett...
【简答题】我们知道,十进制小数0.5表示成二进制是0.1,十进制小数0.25表示成二进制是0.01,十进制小数0.75表示成二进制是0.11,那么十进制数小数0.387表示成二进制的结果是(精确到小数点后8位数字)____________
【多选题】Which of the following ideas are mentioned in the passage as elements of the theory of plate tectonics? Click on 2 answers.
A.
Boundaries where two pieces of the Earth's outer shell diverge.
B.
Zones where one tectonic plate moves under another.
C.
The expansion of oceans and other bodies of water.
D.
The existence of a land bridge that connected continents.
【单选题】All instructors will allow somewhat changed focus in the original topic.
A.
Right
B.
Wrong
C.
Not mentioned
【简答题】Find the department names of all instructors, and remove duplicates
【简答题】List the average salary of all instructors from the instructor relation, then rename the new column of the average salary to avg_salary.
【简答题】The schemas of the instructor and teachs are as follows. Find the names of all instructors who have taught some course and the corresponding course_id.
【简答题】呼吸作用在植物生产上的应用有哪些方面?
相关题目：
参考解析：
知识点：
题目纠错 0
发布
