【单选题】
They can’t leave until they _______ their work .
①
did
②
are doing
③
have done
④
his done
【单选题】
It’s a [填空]. It isn’t an [填空].
①
cherry,apple
②
orange,cherry
③
apple;cherry
④
egg,cake
【单选题】
—Don’t forget to come to my birthday party tomorrow.—I ____ .
①
don’t
②
won’t
③
can’t
④
haven’t
【单选题】
Sorry, I can’t find the books you asked for.____________
①
Don’t mention it.
②
It’s your fault.
③
Thanks anyway.
④
I won’t forgive you.
【单选题】
CD8+T细胞杀伤靶细胞
①
要识别MHCⅠ类分子上的肽类
②
需要替代途径活化补体
③
要识别MHC Ⅱ类分子上的肽类
④
通过Fc受体与包被了抗体的靶细胞结合
⑤
一个CD8+T细胞只杀伤一个靶细胞
【单选题】
—Where is John? I couldn’t find him.— .
①
He is very busy
②
I suppose he could have gone to the meeting room
③
I couldn’t agree more
④
He is good.
【单选题】
下述程序的运行结果（ ）。
#includevoid main()
{
int a=4,b=3,c=5,t=0;
if(aa=b;b=t;
if(aa=c;c=t;
printf(%d,%d,%d\n,a,b,c);
}
①
5,1,3
②
4,5,6
③
5,0,3
④
3,4,7