蜜蜂在找到食物后，会在空中跳“8”字摆尾舞招引同伴前去采蜜，这种现象在生物学上称为 [ ]
A．合作
B．寄生
C．捕食
D．竞争
A
颌支托厚度一般为
A．0.5～0.75mm B．0.25～0.5mm C．1～1.5mm D．2.0mm E．0.5mm
A warm thought suddenly ____ to me ____ I might use the pocket money to buy some
flowers for my mother's birthday.[ ]
A. occurred, if
B. crossed, when
C. came, that
D. struck, that
