皮皮学，免费搜题
登录
搜题
【单选题】
干粉灭火器扑救可燃、易燃液体火灾时,灭火器喷嘴A.
对准火焰的根部
B.
对准火焰的中部
C.
对准火焰的头部
D.
只要往火焰上喷就行
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
【简答题】英文字符A所对应的ASCII码是( )。
【简答题】The average code length for an information source S is strictly less than __________.
【简答题】英文字符a所对应的ASCII码是( )。
【简答题】Consider a code that satisfies the suffix condition: No codeword is a suffix of any other codeword. (i) Is this a uniquely decodable code? Why? (ii) Can you relate the minimum average length of Suffix...
【单选题】What will be the output of the following Python code? a=["Apple","Ball","Cobra"] a.sort(key=len) print(a)
A.
[‘Apple’, ‘Ball’, ‘Cobra’]
B.
[‘Ball’, ‘Apple’, ‘Cobra’]
C.
[‘Cobra’, ‘Apple’, ‘Ball’]
D.
Invalid syntax for sort()
【单选题】In the relation of tblHire (Loan_Num, ember_Id,Video_Code,Hire_Period, Issue_Date,Due_Date,Return_Date, Reminded,Fine,Paid), Which SQL statements can find the average fine(s) by video where the averag...
A.
select Video_Code,AVG(Fine) as Average_Fine from tblHire group by Video_Code where AVG(Fine)>24;
B.
select Video_Code , AVG ( Fine ) as Average_Fine from tblHire group by Video_Code order by Video_Code having AVG ( Fine )> 24 ;
C.
select Video_Code , AVG ( Fine ) as Average_Fine from tblHire where Fine > 24 ;
D.
select Video_Code , AVG ( Fine ) as Average_Fine from tblHire group by Video_Code having AVG ( Fine )> 24 ;
相关题目：