A:①②④
B:②③④
C:①②③
D:①③④
1882年,上海街市出现了中国最早的电灯。“创议之初,华人闻者以为奇事,一时谣言纷传,谓将遭电击,人心汹汹,不可抑制······后以试办无害,其禁乃开。”对此材料理解正确的是( )
Sailing Welcome to our TV show On the Go. Today we are going to talk about an exciting sport—sailing. First let’s talk to Sue,an 18yearold girl who loves sailing.Host: When did you start sailing,Sue?Sue: I started sailing when I was 15 years old.Host: Is it a difficult sport to learn?Sue: Yes,it is more difficult than any other sport. For example,you need to learn about the wind directions(方向) and how to move the sails in the right way.Host: How often do you go sailing?Sue: I go sailing with my father every weekend.Host: How far do you go sailing?Sue: It depends on the wind.Host:OK. Thank you,Sue. Good luck with your sailing.Are you interested in sailing after hearing the interview?If you want to learn sailing,here is a chance for you .The Water Sports Center will organize sailing lessons. Each lesson will cost you ¥20 and there are 5 lessons altogether(总共).
读图,回答下列问题:
有关如图四种细胞的下列叙述中,不正确的是( )