【单选题】do ... while 循环与 while 循环的主要区别是 ( )
A.
while 循环体至少无条件执行一次,而 do … while 循环体可能都不执行
B.
do … while 循环体中可使用 continue 语句, while 循环体中不允许出现 continue 语句
C.
do … while 循环体中可使用 break 语句, while 循环体中不允许出现 break 语句
D.
do … while 循环体至少无条件执行一次,而 while 循环体可能都不执行
【判断题】要制作音频合成效果,最好在多轨模式下进行,这样便于对各轨道上的素材进行单独处理和调整合成效果()
【单选题】Student A: I feel sick. Student B :__________ Student A:I‘ m not sure, but I have got a bad headache.
A.
I' m sorry to hear that.
B.
How are you feeling now?
C.
Do you have a temperature?
【单选题】Buoys which mark isolated dangers are painted with alternating().
【单选题】Buoys which mark isolated dangers are painted with alternating ().
【单选题】You are a student_________ I am a student.
【单选题】假定有 A 、 B 两个投资方案,它们的投资额相同,现金流量总和也相同,但 A 方案的现金流量逐年递增, B 方案的现金流量逐年递减。如果考虑资金时间价值,且两方案均可行的情况下,则下列表述正确的是( )。
【单选题】Student A:It’s terrible.I can’t make anything out of this lecture. Student A:__________.I‘m thinking of dropping the course.
B.
I know nothing about it
D.
The professor speaks well