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【单选题】
B细胞活化的第二信号是：
A.
CD28与B7结合
B.
CD40与CD40L结合
C.
BCR与抗原结合
D.
CD19与抗原结合
E.
TCR与抗原肽-MHC复合物结合
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参考答案：
举一反三
【单选题】George has mustache.
A.
the
B.
an
C.
a
D.
/
查看完整题目与答案
【判断题】入出境人员选择“红色通道”,表明人出境人员没有需办理海关验放手续的物品; 人出境人员选择“绿色通道”,意味着入出境人员需办理行李物品验放手续。符 合“绿色通道”通关条件的入出境人员需向海关出示本人护照 ( 或其他有效旅行 证件 ) 和身份证。 ( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】George has got a bad cold (重感冒). Why?
A.
Because of the bad weather （天气不好）.
B.
Because he didn’t sleep well （没睡好） last night.
C.
Because his parents are sick （生病了）.
查看完整题目与答案
【单选题】听力原文：Before going to the library to return his books, George has his homework done in his classroom and posted his letter in the post office near the school gate. Which of the following things is the ...
A.
Doing his homework.
B.
Returning his books.
C.
Going to library.
D.
Posting his letter.
查看完整题目与答案
【单选题】Which of the following italicized parts is an appositive clause?
A.
That George has married his cousin surprises many of his friends.
B.
It is reported that 5,000 people died in the earthquake.
C.
The news that you told me yesterday proved to be false.
D.
They are excited at the news that their team has won.
查看完整题目与答案
【单选题】What is the most important thing that George has learned from this college?
A.
How to learn.
B.
How to make friends.
C.
How to change other people.
D.
How to take care of himself.
查看完整题目与答案
【单选题】下面程序的功能是使用递归法求解斐波那契数列，请指出实现函数定义功能的语句区间是（ ）行语句。1 n=eval(input("输入数值数据： "))2 def fib(n):3 if n < 3:4 return 15 else:6 return fib(n-1) + fib(n-2)7 for i in range(1, n+1):8 print(fib(i), end=' ' )
A.
1-8
B.
2-8
C.
1-6
D.
2-6
查看完整题目与答案
【单选题】字长为 8 位(包括一位符号位),其机器数可以表示的最大正整数是()
A.
255
B.
256
C.
128
D.
127
查看完整题目与答案
【单选题】______ still young, Mr. George has had amazing achievement in cosmology.
A.
When
B.
As
C.
Although
D.
Since
查看完整题目与答案
【单选题】青花瓷器的款式形成于
A.
元朝
B.
明朝
C.
清朝
查看完整题目与答案
相关题目：
【单选题】George has mustache.
A.
the
B.
an
C.
a
D.
/
查看完整题目与答案
【判断题】入出境人员选择“红色通道”,表明人出境人员没有需办理海关验放手续的物品; 人出境人员选择“绿色通道”,意味着入出境人员需办理行李物品验放手续。符 合“绿色通道”通关条件的入出境人员需向海关出示本人护照 ( 或其他有效旅行 证件 ) 和身份证。 ( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】George has got a bad cold (重感冒). Why?
A.
Because of the bad weather （天气不好）.
B.
Because he didn’t sleep well （没睡好） last night.
C.
Because his parents are sick （生病了）.
查看完整题目与答案
【单选题】听力原文：Before going to the library to return his books, George has his homework done in his classroom and posted his letter in the post office near the school gate. Which of the following things is the ...
A.
Doing his homework.
B.
Returning his books.
C.
Going to library.
D.
Posting his letter.
查看完整题目与答案
【单选题】Which of the following italicized parts is an appositive clause?
A.
That George has married his cousin surprises many of his friends.
B.
It is reported that 5,000 people died in the earthquake.
C.
The news that you told me yesterday proved to be false.
D.
They are excited at the news that their team has won.
查看完整题目与答案
【单选题】What is the most important thing that George has learned from this college?
A.
How to learn.
B.
How to make friends.
C.
How to change other people.
D.
How to take care of himself.
查看完整题目与答案
【单选题】下面程序的功能是使用递归法求解斐波那契数列，请指出实现函数定义功能的语句区间是（ ）行语句。1 n=eval(input("输入数值数据： "))2 def fib(n):3 if n < 3:4 return 15 else:6 return fib(n-1) + fib(n-2)7 for i in range(1, n+1):8 print(fib(i), end=' ' )
A.
1-8
B.
2-8
C.
1-6
D.
2-6
查看完整题目与答案
【单选题】字长为 8 位(包括一位符号位),其机器数可以表示的最大正整数是()
A.
255
B.
256
C.
128
D.
127
查看完整题目与答案
【单选题】______ still young, Mr. George has had amazing achievement in cosmology.
A.
When
B.
As
C.
Although
D.
Since
查看完整题目与答案
【单选题】青花瓷器的款式形成于
A.
元朝
B.
明朝
C.
清朝
查看完整题目与答案
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