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【简答题】
2岁患儿，发热1天出现皮疹，为红色斑丘疹，由面部开始一日遍及全身，伴枕部、耳后及颈部淋巴结肿大，诊断最可能为（ ）。
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举一反三
【单选题】The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.
A.
quantity of fuel to be received
B.
flash point of the fuel as it is received
C.
fuel temperature as it is received
D.
viscosity of the fuel being received
【单选题】Re-circulating the fuel when the engine is stopped can______.①keep the fuel at the correct viscosity ②cool the injector
A.
①
B.
②
C.
①②
D.
neither ① nor ②
【简答题】when the fuel is provided by the supplier ,what specifications of the oil can you get from the supplier receipt ?
【单选题】在学生课程管理中分别使用以下二种表示,即: (1)表SC(学号,姓名,课程号,课程名,学时,学分,成绩); (2)表STUDENT(学号,姓名,课程号)和表COURSE(课程号,课程名,学时,学分,成绩)。 则以下叙述正确的是( )。
A.
采用(1)表示的数据冗余量大,查找速度也慢
B.
采用(1)表示的数据冗余量大,但查找速度快
C.
采用(2)表示的数据冗余量大,查找速度也慢
D.
采用(2)表示的数据冗余量大,但查找速度快
【单选题】对 Course表,使用课程号,课程名,学分,及额外增加的iXueshi字段创建视图,学时为学分乘以16,正确的SQL语句是( )。
A.
Create Index ShiTu As Select Cno,Cname ,Ccredit ,Ccredit *16 as iXueshi from Course
B.
Create View ShiTu As Select Cno,Cname ,Ccredit ,Ccredit *16 from Course
C.
Create Proc ShiTu As Select Cno,Cname ,Ccredit ,Ccredit *16 as iXueshi from Course
D.
Create View ShiTu As Select Cno,Cname ,Ccredit ,Ccredit *16 as iXueshi from Course
【单选题】对 Course表，使用课程号，课程名，学分，及额外增加的iXueshi字段创建视图，学时为学分乘以16，正确的SQL语句是( )。
A.
Create View ShiTu As Select Cno,Cname ,Ccredit ,Ccredit *16 as iXueshi from Course
B.
Create View ShiTu As Select Cno,Cname ,Ccredit ,Ccredit *16 from Course
C.
Create Proc ShiTu As Select Cno,Cname ,Ccredit ,Ccredit *16 as iXueshi from Course
D.
Create Index ShiTu As Select Cno,Cname ,Ccredit ,Ccredit *16 as iXueshi from Course
【单选题】在学生课程管理中分别使用以下两种表示,即: ( 1 )表 SC (学号,姓名,课程号,课程名,学时,学分,成绩); ( 2 )表 STUDENT (学号,姓名,课程号)和表 COURSE (课程号,课程名,学时,学分,成绩)。 则以下叙述正确的是 ________ 。
A.
采用（ 1 ）表示的数据冗余量大，查找速度也慢
B.
采用（ 2 ）表示的数据冗余量大，查找速度也慢
C.
采用（ 1 ）表示的数据冗余量大，但查找速度快
D.
采用（ 2 ）表示的数据冗余量大，但查找速度快
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