皮皮学，免费搜题
登录
搜题
【单选题】
异构体之间存在( )的特点A.
度相同，方向相同
B.
度相同，方向相反
C.
度相反，方向相同
D.
度相反，方向相反同
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
【单选题】(73) is the first line of protect between your computer and the public Internet.
A.
The Internet protocol
B.
The firewall
C.
The anti-virus software
D.
The intrusion-detection systems
【单选题】美国人1954年实施了旨在评价Salk疫苗预防小儿麻痹或死于脊髓灰质炎效果的临床试验。有180万儿童参与,约有1/4参与者得到了随机化。上述试验最终肯定了索尔克疫苗的效果。请问此结论是针对( )而言。
A.
180万儿童
B.
每个儿童
C.
所有使用索菲克疫苗的儿童
D.
所有儿童
E.
180万份样本
【单选题】20100273(73) is the first line of protect between your computer and the public Internet.
A.
The Internet protocol
B.
The firewall
C.
The anti-virus software
D.
The intrusion-detection systems
【单选题】Which of the following statements about the Internet is true?
A.
ARPA was the first net used by American universities and institutions.
B.
The history of the Internet can be traced back to fifty years ago.
C.
The purpose of the Internet is to protect the world in the event of war.
D.
ARPAnet formed the foundation of the Internet nowadays.
【简答题】城市轨道交通场站综合开发范围内的用地,应当根据城市轨道交通建设进度()、()、()。
【简答题】一个网站通常包含多个________, 网站其实就是_______的集合,网页与网页之间通过_______互相访问。
【简答题】当你想表达自己想成为一名科学家时,可以这样说: “ _______________________________________________________________________________________.
【单选题】() is the first Iine of protect between your computer and the public Internet.
A.
The Internet protocol
B.
The firewall
C.
The anti-virus software
D.
The intrusion-detection systems
【单选题】Which pf the following used the Internet first?
A.
Hospitals.
B.
Universities.
C.
Banks.
D.
The government.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
