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【单选题】
已知下列命题中,其中正确的个数是( ) 1相同的两个常数列对应减,得到的数列是各项均为零的数列 ; 2相同的两个常数列对应加,得到的数列仍为常数列 ; 3相同的递增数列和递减数列对应加,得到的数列为常数列。A.
0 个
B.
1 个
C.
2 个
D.
3 个
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反馈参考答案：
举一反三
【单选题】Part B Directions: You will hear four dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each ques...
A.
an advertisement.
B.
a sales clerk's comment.
C.
a druggist' s suggestion.
D.
an article.
【简答题】分配关系是生产关系的基础。 ( )
【单选题】Part B Directions: You will hear four dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each ques...
A.
To improve his skating techniques.
B.
To visit his sister.
C.
To take a vacation.
D.
To learn to ski.
【简答题】分配关系是生产关系的基础。( )
【简答题】非谓语动词 5-6 一、单选题(共 50 题;共 100 分) 1.Nowadays, Young people send messages to their parents instead of ______ them. A. Write to B. writing C. writing to D. writes 2.We should urge people _______ riding in...
【单选题】甲状腺素作用机制()
A.
产生β射线，破坏甲状腺实质
B.
抑制蛋白水解酶而抑制甲状腺素释放
C.
维持生长发育，促进机体代谢和产热
D.
阻碍T3，T4与其受体结合
E.
阻碍过氧化物酶，抑制甲状腺素的合成
【简答题】分配关系是生产关系的基础。（ ）
【简答题】Listen to the conversation and fill in the blanks. A: Hey, what's wrong? You look really stressed! B: I have an important ___1___ tomorrow. I've been studying for it all week, but I feel like I don'...
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