【单选题】【消耗次数：1】
+A=（ ）
①
+B
②
+
③
A+
④
A+B
参考答案：
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相关题目
【单选题】
以下程序段：int i,a=3,b=2;i=(--a==b++)?--a:++b;printf(i=%d a=%d b=%d,i,a,b);输出结果是。
①
i=1 a=1 b=3
②
i=3 a=2 b=3
③
i=4 a=1 b=4
④
i=4 a=2 b=4
【简答题】
(a, b)[a, b] = [填空].
【单选题】
下述程序的运行结果（ ）。
#includevoid main()
{
int x=1,a=0,b=0;
switch(x)
{
case 0:b++;
case 1:a++;
case 2:a++;b++;
}
printf(a=%d,b=%d\n,a,b);
}
case 1:a++;
case 2:a++;b++;
}
printf(a=%d,b=%d\n,a,b);
}
①
a=1,b=1
②
a=2 ,b=1
③
a=2,b=2
④
a=3,b=3
【单选题】
文法G【S】=（{b}，{S，B}，S，{S→b│bB，B→bS}），该文法所描述的语言____。
①
L(G[S])={b2i+1│i≥0}
②
L(G[S])={b2i+1│i≥1}
③
L(G[S])={bi│i≥0}
④
L(G[S])={b2i│i≥0}
随机题目
【单选题】
16.I dont have to introduce the boy to you ___-you know him.
①
since
②
until
③
unless
④
but
【单选题】
15.Please drop in whenever you can.. I’d like to keep _________ touch..
①
in
②
to
③
on
④
with
【单选题】
13. A fire broke out at the school but the teacher were able to lead the ___________ children to safety.
①
frightened
②
frightening
③
frighten
④
fright
【单选题】
17.I dont think we can finish all the work before Friday, ____we?
①
shall
②
will
③
can
④
do
【单选题】
19.Though she talks little, she has made _______ friends here.
①
a few
②
few
③
littlle
④
a little