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【简答题】
（本小题满分16分） 已知数列 满足 ,(1)若 ，求 ； （2）是否存在 ,使当 时， 恒为常数。若存在求 ，否则说明理由； （3）若 ,求 的前 项的和 （用 表示）
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举一反三
【单选题】听力原文： The purpose of communication is to get your message across to others. This is a process that involves both the sender of the message and the receiver. This process leaves room for errors, with m...
A.
How to communicate effectively.
B.
Why successful communication are important.
C.
What communication is.
D.
How to avoid direct communication.
【简答题】Read and write related numbers in the boxes. 1. This a common way to meet people. 2.This is sort of unusual. 3.This is very usually. p at school p at a party p at a health club p at a shopping mall p ...
【单选题】The functions of language do NOT include _______.
A.
informative function
B.
interpersonal function
C.
metacognitive function
【多选题】以下对下列语句的描述,不正确的有( ) this is the first news this is the second news
A.
this is the first news和this is the second news在同一行中
B.
this is the first news和this is the second news所采用的样式相同
C.
此语句中有说语法错误，第一段落的class和第二段落的class命名一样
D.
此语句中有三个段落
【判断题】This is a header This is a paragraph. //此颜色为绿色 This is a header This is a paragraph. 以上代码运行结果为: This is a header This is a paragraph. This is a header This is a paragraph.
A.
正确
B.
错误
【单选题】The functions of gastrin do not include:
A.
increses the secretion salivary juice
B.
increses the secretion of gastric juice
C.
promotes the gastric motility
D.
increases the pancretic juice secretion
【简答题】This medicine is p______ if taken in large quantities.
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