水的比热容为4.2×103J/(kg•℃),一杯水倒去一半,剩下的半杯水比热容为____ .夏天,光脚走在海滩上会感觉到沙“烫脚”,走进海水中却感觉到海水很凉,这主要是由于水的比热容____ (选填“大于”、“小于”或“等于”)沙子比热容的缘故.
图为一块马铃薯甲虫成灾区域先后使用两种杀虫剂的实验结果曲线图,请据图回答:
从方框中选择恰当的句子完成对话。有两项多余。
A. How old are you?
B. May I have your telephone number?
C. I want to join the basketball club.
D. Can you play the violin?
E. W-H-I-T-E ,White.
F. Can you play basketball? G. What club do you want to join?
A: Can I help you?
B: Yes, please. ____
A: OK. What's your name?
B: Sam White.
A: How do you spell your last name?
B: ____
A: Thank you. ____
B: I'm fourteen.
A: ____
B: Yes, but I can't play it well.
A: I see. ____
B: Yes, it's 233-6589.
A: Thank you.