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【判断题】
安全标志分为禁止标志、警告标志、指令标志和指示标志四大类型。不包括设备标志。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】听力原文：M: Come in, Sharon and take a seat. W: Thanks. M: So, where do we start? Should we begin with a look at last year and then go on from there? W: Fine. M: So, how do you feel you've done in your fi...
A.
it is difficult for her to know the program well.
B.
it regularly stops working.
C.
the monitor is too small.
【单选题】听力原文：A: Come in Sharon and take a seat. B: Thanks. A: So, where do we start? Should we begin with a look at last year and then go on from there? B: Fine A: So, how do you feel you've done in your firs...
A.
it is diffcult for her to know the program well.
B.
it regularly stops working.
C.
the monitor is too small.
【单选题】听力原文：M: Come in Sharon and take a seat. So, where shall we start? Should we begin with a look at last year? W: Fine. M: How do you feel about your work in your first full year in the company? W: Well,...
A.
Some time last year.
B.
One year ago.
C.
Over a year ago.
D.
Half a year ago.
【单选题】下列关于引起的污染的环境内分泌干扰物,说法有误的是( )
A.
双酚A是有机化工原料，主要用于生产聚碳酸酯、环氧树脂、聚砜树脂、聚苯醚树脂等多种高分子材料。
B.
邻苯二甲酸酯类 (PAEs) 又称酞酸酯类，是邻苯二甲酸形成的酯的统称。一般指的是邻苯二甲酸与4～15个碳的醇形成的酯。
C.
二噁英类 是以二噁英为代表的一类有机氯化合物，包括多氯二苯并二噁英 (PCDD) 和多氯二苯并呋喃 (PCDF) 。
D.
五氯酚 一般以五氯酚钠的形式使用，主要用作 增塑剂。
【单选题】听力原文：A: Come in Sharon and take a seat. B: Thanks. A: So, where do we start? Should we begin with a look at last year and then go on from there? B: Fine A: So, how do you feel you've done in your firs...
A.
it is difficult for her to know the program well.
B.
it regularly stops working.
C.
the monitor is too small.
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