皮皮学，免费搜题
登录
搜题
【单选题】
下列运算中不属于关系运算的是( )。A.
选择运算
B.
投影运算
C.
连接运算
D.
比较运算
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】听录音，选出你听到的句子。 ( ) 1. A. Happy New Year, Miss White! B. Happy birthday, Miss White! ( ) 2. A. This is for you, Zoom! B. This is for you, Zip! ( ) 3. A. May I have a look? B. Look! I have a ...
【单选题】Miss White _____ for the last few weeks.
A.
has been busy with many things
B.
has been quite free
C.
has done few things
D.
has little time for many things
【简答题】热电模拟法(或热电比拟)中,电流等价于 ,电压等价于 ,电阻等价于 , 电压源等价于 ,电流源等价于 。
【简答题】One day, Miss White went over for the test results of all the students in the 7th grade. 'You all did pretilly well,' she told the class, 'except one boy, but it broke my heart to tell you this.' She ...
【单选题】C51单片机中TCON寄存器中IT0位的作用是?
A.
外部中断0的中断请求标志
B.
外部中断0的触发方式控制位
C.
定时/计数器0溢出中断请求标志位
D.
以上都不对
【单选题】According to the second paragraph, businesses are now encountering
A.
a wider range of obligations.
B.
greater public criticism.
C.
problems they should have foreseen.
D.
an increase in internal disagreement.
【单选题】We haven’t seen Miss White for quite a few months since she was ____ into a big hospital round the corner.
A.
vanished
B.
endured
C.
invited
D.
admitted
相关题目：
参考解析：
知识点：
题目纠错 0
发布
