星期天,小明和同学一起到田野,他们看到了很多植物,有小麦、玉米、大豆、水稻等,他们想对这些植物进行分类,分类的重要依据应该是( )
A:花、果实、种子
B:根、茎、叶
C:根、花、种子
D:茎、叶、种子
骨的基本结构包括( )
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.
“吸烟有害健康”,我国政府规定:从2011年5月1日起,公共室内禁止吸烟。烟草燃烧释放的物质中,能与血红蛋白结合引起中毒的是()