NK细胞无需抗体和补体的协助可自发识别并溶解某些肿瘤细胞。()
- · 有6位网友选择 错,占比66.67%
- · 有3位网友选择 对,占比33.33%
B.were
C.have
D.has
Ramon was very proud of his dog Blackie.Whenever he got a chance, he would ask his dog to amuse his friends with some tricks.
One day Ramon went to visit his friend Frank who was sick at home with a bad cold.“How are you feeling? ” asked Ramon.“Worse than yesterday, ” replied Frank.“I have a terrible cough, and there's not a drop of medicine in the house.”
“Cheer up, Frank.I'll send Blackie to the local drugstore for some cough syrup(糖浆).He'll be back in a minute, before you know it.” Ramon put a five-dollar bill in Blackie's mouth and the dog ran down the street.“And keep the change, ” Ramon shouted after him.
“Oh, Ramon, don't be silly.You know that dog won't be back with any medicine.” “Oh yes, he will, ” replied Ramon.Half an hour later, however, Blackie had not returned.Ramon was feeling embarrassed, and felt angry at his friend's little smile.
“Something has happened to him, I'm sure, ” said Ramon.“He obeys me as a rule.” Just then Frank saw Blackie at a distance.He hurried to open the door and let him in.Frank was shocked to see a bottle of medicine in the dog's mouth.
“Good boy, ” said Ramon, “but what took you so long? ” Blackie ran over to the window, barking and wagging(摆动)his tail.Ramon glanced out and saw a bone outside.
1、Frank's cold had worsened and he had no medicine at home.
2、Ramon called for a doctor.
3、Ramon felt embarrassed when Blackie was late.
4、Blackie barked at the bone outside the window because he wanted to have it.
5、The story mainly implies dogs are after all dogs, however clever they are.
为了保护您的账号安全,请在“简答题”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!