皮皮学，免费搜题
登录
搜题
【单选题】
已知y=f(x)是从集合M到集合N的函数,下列说法正确的是
A.
N中不同元素在M中所对应的元素可能相同
B.
M中不同元素在N中所对应的元素可能相同
C.
M中不同元素在N中所对应的元素必不相同
D.
N中可能有两个元素与M中的某一个元素对应
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】He joined the army ten years ago. That is to say, he ____in the army for a decade.
A.
was
B.
has been
C.
is
D.
had been
查看完整题目与答案
【单选题】He in the army for ten years, and he retired last year.
A.
has served
B.
had served
C.
served
D.
had been served
查看完整题目与答案
【单选题】It can be inferred from the third paragraph that the President______.
A.
is in favor of choice advocates
B.
does not like the idea of abortion
C.
wants Roe to be arrested
D.
is not very popular in the country
查看完整题目与答案
【单选题】材料题请点击右侧查看材料问题 查看材料
A.
The woman's choice is wise.
B.
It is not easy to go to an unusual site.
C.
Guidebook should be updated.
D.
They have to choose the popular sites.
查看完整题目与答案
【单选题】He hated the war so much that he decided to leave the army for good .
A.
permanently
B.
for good-looking
C.
for a long time
D.
shortly
查看完整题目与答案
【单选题】以下哪个不属于空运的优点?
A.
transit
B.
packing
C.
security
D.
Size limits
查看完整题目与答案
【判断题】雷电来临前，可以进行接触网上作业。
A.
正确
B.
错误
查看完整题目与答案
【判断题】从技术角度来看,信息系统安全一般包括计算机安全、网络安全和信息安全 3 个方面。
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下哪一个属于航空运输的优点
A.
原始投资少，资金周转快
B.
包装要求低
C.
可以利用天然的河道、海洋条件，实现大吨位，长距离的运输。
D.
功率大、速度快、过载能力强和运行可靠等，而且不污染环境，特别适用于运输繁忙的干线和隧道多，坡度大的山区。
查看完整题目与答案
【多选题】从技术角度看,计算机系统安全包括()()和()。
A.
计算机安全
B.
网络安全
C.
信息安全
D.
人员安全
查看完整题目与答案
相关题目：
【单选题】He joined the army ten years ago. That is to say, he ____in the army for a decade.
A.
was
B.
has been
C.
is
D.
had been
查看完整题目与答案
【单选题】He in the army for ten years, and he retired last year.
A.
has served
B.
had served
C.
served
D.
had been served
查看完整题目与答案
【单选题】It can be inferred from the third paragraph that the President______.
A.
is in favor of choice advocates
B.
does not like the idea of abortion
C.
wants Roe to be arrested
D.
is not very popular in the country
查看完整题目与答案
【单选题】材料题请点击右侧查看材料问题 查看材料
A.
The woman's choice is wise.
B.
It is not easy to go to an unusual site.
C.
Guidebook should be updated.
D.
They have to choose the popular sites.
查看完整题目与答案
【单选题】He hated the war so much that he decided to leave the army for good .
A.
permanently
B.
for good-looking
C.
for a long time
D.
shortly
查看完整题目与答案
【单选题】以下哪个不属于空运的优点?
A.
transit
B.
packing
C.
security
D.
Size limits
查看完整题目与答案
【判断题】雷电来临前，可以进行接触网上作业。
A.
正确
B.
错误
查看完整题目与答案
【判断题】从技术角度来看,信息系统安全一般包括计算机安全、网络安全和信息安全 3 个方面。
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下哪一个属于航空运输的优点
A.
原始投资少，资金周转快
B.
包装要求低
C.
可以利用天然的河道、海洋条件，实现大吨位，长距离的运输。
D.
功率大、速度快、过载能力强和运行可靠等，而且不污染环境，特别适用于运输繁忙的干线和隧道多，坡度大的山区。
查看完整题目与答案
【多选题】从技术角度看,计算机系统安全包括()()和()。
A.
计算机安全
B.
网络安全
C.
信息安全
D.
人员安全
查看完整题目与答案