“乘坐自动扶梯时,应该靠右站稳,留出左侧的通道给赶时间的人通行。”这是国际通行的乘梯礼仪。对此,有专家指出:手扶电梯“左行右立”存在安全隐愚,因为乘客都靠一边站会使扶梯受力不均,容易造成右侧磨损,而且人在运行的扶梯上走动本来就不安全。该专家的观点( )
①认为文明礼仪规则的约定与选择应符合科学
②从安与危的关系看,抓住了事物的主要矛盾
③违背了通行的乘梯礼仪,没有做到实事求是
④质疑了通行做法,体现了唯物辩证法的本质
A:①②
B:①③
C:②③
D:①④
补全对话
从方框中选择最佳选项完成对话,有两项多余
a. Yes!
b. The keys? They're on the table.
c. No, they aren't.
d. How about my books?
e. It's under the desk.
f. Where are they?
g. Thank you very much.
A: Hi, Susan! My keys(钥匙) are lost(丢失). ____
B: Are they on the table?
A:____
B: En. . . Are they in your bag?
A: But where is my bag?
B:____
A:____They are here. But there aren't any books in my bag.
B: Ha- ha. Are they lost, too?
A: Oh, no.
B: Look! They are on the shelf (架子).
B: Not at all.
我市2016年某一周每天的最高气温(单位:℃)统计如下:10,16,12,11,14,12,13,则这组数据的众数是( )