皮皮学，免费搜题
登录
搜题
【单选题】
100W标准白炽灯和被测白炽灯之间放一个漫反射白板(两面漫反射系数相等),标准灯泡离白板33mm,当被测灯泡移动到离白板66mm处时,白板两表面光照度相等,则被测灯泡的功率为()。A.
250W
B.
100W
C.
25W
D.
400W
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】John is very diligent, but his pay isn't sufficient enough for his work.
A.
good
B.
much
C.
legal
D.
sound
【单选题】What is the author's opinion on doctors' right to help people end their lives?
A.
It is legalized murder.
B.
It is appropriate and enlightened.
C.
It is out in the open.
D.
Not given.
【单选题】Failure to advertise (could) result in either (reduced) sales and (less) profit (nor) legal actions.
A.
could
B.
reduced
C.
less
D.
nor
【单选题】He shifted his position a little in order to alleviate the pain in his legA.control ###SX
A.
He shifted his position a little in order to alleviate the pain in his leg A.control
B.
ease
C.
experience
D.
suffer
【简答题】造成臭氧层破坏的主要气体是什么?破坏机理是什么 ?
【判断题】A non-firm offer is an expression for accepting the transaction terms with a lega l promise.
A.
正确
B.
错误
【单选题】His grandfather made a real difference to his life by leaving him a generous
A.
legend
B.
legacy
C.
legion
D.
heritage
【简答题】造成臭氧层破坏的主要气体是什么？破坏机理是什么？
相关题目：
参考解析：
知识点：
题目纠错 0
发布
