皮皮学,免费搜题
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搜题
【单选题】
一个年级有12个班,每个50名同学,随机编号为1~50,为了了解他们在课外的兴趣,要求每班第40号同学留下来进行问卷调查,这里运用的抽样方法是(  )
A.
抽签法
B.
分层抽样法
C.
随机数表法
D.
系统抽样法
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举一反三
【多选题】电子邮件营销的优势是
A.
一对一优势
B.
价格优势
C.
简洁、方便、直观
D.
友情式营销
E.
程序化优势
【单选题】Passage 3 Questions 11 to 15 are based on the following passage: On November 19, 1863, Abraham Lincoln went to Gettysburg in Pennsylvania to speak at the National Soldiers Cemetery. The Civil War was ...
A.
very critical
B.
unpopular
C.
very popular
D.
very courteous
【多选题】以下采样频率中,目前音频卡所支持的是。
A.
44.1kHz
B.
22.05kHz
C.
100kHz
D.
50kHz
【单选题】It was on November 15, 2010 ______ a big fire happened in Shanghai, ______ was a great shock to lots of people. [     ]
A.
when; that
B.
that; when
C.
which; when
D.
that; which
【单选题】以下的采样频率中是目前音频卡所支持的为( )kHz。
A.
20
B.
11.025
C.
10
D.
50
【多选题】电子邮件营销的优势是(    )。
A.
一对一优势    
B.
价格优势    
C.
方便直观    
D.
友情式营销
【单选题】The first overseas promotion event of CDFTZ was held in ____ on November 2017.
A.
China
B.
Malaysia
C.
Singapore
D.
Japan
【单选题】You may use the room as you like ___ you clean it up afterwards.
A.
so far as
B.
so long as
C.
in case
D.
even if
【单选题】以下哪个SQL PLUS命令是用于描述表结构的( )。
A.
SELECT
B.
DESCRIBE
C.
DISC
D.
HELP
【简答题】____ 是电子邮件营销的优势所在。
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