皮皮学，免费搜题
登录
搜题
【简答题】
在牛顿环实验装置中，曲率半径为R的平凸透镜与平玻璃扳在中心恰好接触，用波长600nm的单色光垂直照射牛顿环装置时，中央暗斑外第4个暗环所对应的空气膜厚度为_________【图片】。
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】Which of the following statements is tree, according to the author of this passage?
A.
Certification is very common so you need to get certified, too.
B.
Certification is needed in a wide variety of fields, so may be in yours.
C.
Certification is varied because of more emerging careers and areas.
D.
Certification is becoming more and more important for every one.
【单选题】以下对TCP和UDP协议区别的描述,哪个是正确的()
A.
UDP用于帮助IP确保数据传输,而TCP无法实现
B.
UDP提供了一种传输不可靠的服务,主要用于可靠性高的局域网中,TCP的功能与之相反
C.
TCP提供了一种传输不可靠的服务,主要用于可靠性高的局域网中,UDP的功能与之相反
D.
以上说法都错误
【单选题】Which of the following statements is true, according to the author of this passage?
A.
Certification is very common so you need to get certified, too.
B.
Certification is needed in a wide variety of fields, so may be in yours.
C.
Certification is varied because of more emerging careers and areas.
D.
Certification is becoming more and more important for every one.
【简答题】气门间隙过小可能导致
【单选题】The Owners guarantee that the Vessel to be at all times _______ valid and up-to-date certificates to comply with such regulations in every respect．
A.
in stead of
B.
in lieu of
C.
in possession of
D.
in place of
【单选题】汉译英：“产地证书、兽医证书、熏蒸证书”。( )
A.
Certificate of Origin Veterinary Certi6cate Fumigation Certificate
B.
Certificate if Origin Certificate of Health Disinfection Certificate
C.
Certificate of Origin Sanitary Certificate Fumigation Certificate
D.
Certificate of Origin Veterinary Health Certificate Fumigation Certificate
【单选题】What is NOT required on an uninspected towing vessel?
A.
Certificate of Documentation
B.
Certificate of Inspection
C.
Operators Merchant Marine license
D.
FCC Station License
【单选题】______ should be presented to the Customs officers．
A.
Bonded Store List
B.
Deratization Certificate
C.
Load line Certificate
D.
Radio Safety Certificate
相关题目：
参考解析：
知识点：
题目纠错 0
发布
