信號

signal （信號） __11__ the driver __12__ on.” His wife explained， “Only the conductor __13__ to ring the bell twice. That's why the conductor __14__ so angry！”Henry nodded （點(diǎn)頭）. “I __15__，” he said.1. A. got off? ? ? B. gets off? ? C.

美m(xù)ěi洲zhōu大dà赤chì魷yóu生shēnɡ活huó在zài光ɡuānɡ線xiàn微wēi弱ruò的de深shēn海hǎi，但dàn當(dāng)dānɡ它tā們men群qún體tǐ行xínɡ動dònɡ時shí，卻què很hěn少shǎo會huì撞zhuànɡ到dào彼bǐ此cǐ。這zhè是shì為wèi什shén么me呢ne？近jìn期qī發(fā)fā表biǎo于yú《美m(xù)ěi國ɡuó國ɡuó家jiā科kē學(xué)xué院yuàn院yuàn刊kān》的de一yì篇piā