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【单选题】
Which of the following is true about the present swine flu viruses?
A.
The viruses can infect different species.
B.
The genes of the viruses come from pigs.
C.
The viruses mix genes from different species.
D.
The genes of the viruses were made artificially.
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举一反三
【单选题】具有中枢降压作用的是
A.
莫索尼定
B.
氯沙坦
C.
氢氯噻嗪
D.
硝苯地平
E.
卡托普利
【简答题】The date of ______ will be deemed to be the date of shipment unless the transport document contains a reception stamp in which case the date of the reception stamp will be deemed to be the date of shi...
【单选题】Which of the following Date class constructors creates a Date object that contains the current date and time from the local computer?
A.
Date()
B.
Date(milliseconds)
C.
Date(date_string)
D.
Date(year, month[, date, hours, minutes, seconds, milliseconds])
【单选题】John plays basketball well, _____his favorite sport is badminton. 21
A.
so     
B.
or   
C.
yet    
D.
for 21
【多选题】Examine the description of the STUDENTS table: STD_ID NUMBER(4) COURSE_ID VARCHARD2(10) START_DATE DATE END_DATE DATE Which two aggregate functions are valid on the START_DATE column?()
A.
SUM(start_date)
B.
AVG(start_date)
C.
COUNT(start_date)
D.
AVG(start_date, end_date)
E.
MIN(start_date)
F.
MAXIMUM(start_date)
【单选题】下列关于气雾剂的特点错误的是
A.
具有速效和定位作用
B.
由于容器不透光、不透水,所以能增加药物的稳定性
C.
药物可避免胃肠道的破坏和肝脏首过作用
D.
可以用定量阀门准确控制剂量
E.
由于起效快,适合心脏病患者使用
【多选题】Examine the description of the STUDENTS table: STD_ID NUMBER(4) COURSE_ID VARCHAR2(10) START_DATE DATE END_DATE DATE Which two aggregate functions are valid on the START_DATE column? ()
A.
SUM(start_date)
B.
AVG(start_date)
C.
COUNT(start_date)
D.
AVG(start_date, end_date)
E.
MIN(start_date)
F.
MAXIMUM(start_date)
【简答题】具有中枢降压作用的药物是
【单选题】下面程序的运行结果是( )。 #define _CRT_SECURE_NO_WARNINGS #include #include int main() { enum weekday { SUM , MON , TUE , WED , THU , FRI , SAT }; enum weekday date1, date2, date3; date1 = SAT ; date2 = WED ; da...
A.
date1=6,date2=3,date3=0
B.
date1=2,date3=3,date3=6
C.
date1=6,date2=0,date3=3
D.
date1=3,date2=3,date3=6
【单选题】下列关于气雾剂的特点错误的是
A.
具有速效和定位作用
B.
由于起效快,适合心脏病患者适用
C.
可用定量阀门准确控制剂量
D.
药物可避免胃肠道的破坏和肝脏首过作用
E.
由于容器不透光、不透水,所以能增加药物的稳定性
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