()提出的“任意球的表面积都是其外切圆柱表面积的三分之二”这一重要数学观点。
A、欧几里得
B、阿基米德
C、西塞罗
D、托勒密
参考答案:B
在对话的空白处填入适当的句子,使对话意思完整,每空一句。
A: Morning! Granny, You look so pale. (1)______________
B: Oh, boy. It's difficult for me to breathe.
A: (2) ______________
B: I've been like this since last month.
A: That's too bad. Did you sleep well last night?
B: (3) ______________ I can't sleep well at night because of the factory noise.
A: Pollution causes too many problems. I can't stand the environment here, either.
B: Shall we write to the newspaper about the problems?
A: (4) ______________ But I am afraid you have to see a doctor first.
B: (5) ______________ Thank you!
斑蝥背部革质鞘翅的特点
A.黑色,具红色条纹
B.黑色,有3条黄色或棕黄色的横纹
C.乌黑色,具白色条纹
D.黄色,有3条白色纵条纹
E.乌黑色,具红色斑点