入户访问调查一般是指到被调查者的家中或工作单位进行的访问调查。（ ）
查看答案
在各种调查方法中，实验法最具科学色彩。（ ）
A. 对
B. 错
对老年人购买习惯的电话访问，最好选择在晚上进行。（ ）
A. 对
B. 错
Match the words on the left with their meanings on the right.
Choose the right things to do in each of the following situations.1. You are swimming and sunbathing on a beach.
A. Leave your iPod in a locked waterproof case.
B. Put your iPod directly in the sunlight while sunbathing.
C. Listen to your iPod at 50% volume for more than two hours on the beach.
微信支付 
支付宝支付