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【多选题】
关于验证码的描述，下列说法正确的是（）。A.
验证码就是一串随机产生的数字或符号
B.
验证码不是随机产生的
C.
验证码在用户登录或注册网站账号过程中经常出现
D.
通过for循环以及给变量赋值的方法，可以制作验证码效果
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反馈参考答案：
举一反三
【简答题】I. Listen to five short dialogues and choose the best answer for each question.
【单选题】I. Listen to five short conversations and choose the best answer to each question you hear. 1.
A.
In a bar
B.
At home
C.
In the office
D.
At a cinema
【单选题】I. Listen to five questions. Choose a proper response for each question you hear. Each question will be spoken only once.
A.
I lived in Australia for a year and I just picked it
B.
I love America and I’d like to live there.
C.
Canada is a great place for studying.
【多选题】关于可再生能源发展政策的说法，正确的有______。
A.
国家环保部门编制全国可再生能源开发利用规划
B.
扶持在电网未覆盖的地区建设可再生能源独立电力系统
C.
鼓励清洁、高效的开发利用生物质燃料
D.
鼓励和支持农村地区的可再生能源开发利用
E.
鼓励单位和个人安装和使用太阳能热水系统
【简答题】I. Short Dialogue Directions. You will hear five short dialogues. Listen to each of them and choose the best answer to it.
【单选题】Listen to five questions and choose the appropriate answers.
A.
What do you suggest?
B.
Can you tell how?
C.
Sorry about that!
D.
Hmm… so do I.
【单选题】I. Listen to the five short dialogues and choose the best answer for each question . What is the probable relationship between the speakers?
A.
Husband and wife
B.
Customer and saleswoman
C.
Classmates
D.
Workmates
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