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【单选题】
某公司甲、乙、丙、个地区分别有150 个、120个、180个、150个销售点，公司为了调查产品的情况，需从这600个销售点中抽取一个容量为100的样本，记这项调查为①；在丙地区中有20个特大型销售点，要从中抽取7个调查其收入和售后服务等情况，记这项调查为②.则完成这两项调查宜采用的抽样方法依次（ ）A.
简单随机抽样法，分层抽样法
B.
系统抽样法，分层抽样法
C.
分层抽样法，简单随机抽样法
D.
分层抽样法，系统抽样法
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举一反三
【单选题】—Look! Some people are running the red lights. —We should wait ______ others are breaking the rule.
A.
although
B.
if
C.
unless
D.
because
【单选题】赵女士,G1P0,末次月经日期记不清,来医院检查时子宫底在脐下一横指,胎心音正常,估计孕龄为妊娠
A.
16周末
B.
20周末
C.
24周末
D.
28周末
E.
32周末
【单选题】The_______ people are running to see the __________ accident.
A.
astonishing; astonished
B.
astonished; astonishing
C.
astonishing; astonishing
D.
astonished; astonished
【简答题】Complete the conversation with expressions from the boxes. Philippa: Mike is running a half-marathon! Timo: (1) ________________ people are running nowadays. Philippa: The problem is that ...
【单选题】Why are many people running into problems?
A.
Because names are very expensive and selling out so fast.
B.
Because there are no rules in domain name management.
C.
Because a small business doesn't have access to legal counsel.
【单选题】听力原文：(A) A person is running. (B) People are walking their dogs. (C) People are sitting on a bench. (D) A man is fishing from the bridge.
A.
B.
C.
【简答题】听力原文：(A) People are waiting to cross a city street. (B) People are waving to each other across the street. (C) People are crossing a city street. (D) People are running in the street.
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