A:盖天说
B:大陆漂移假说
C:浑天说
D:日心说
若(2+x)(x-5)=0,则x的值是( )
点燃下列各组物质,一定不会发生爆炸的是( )
⑴The man couldn't find a ____ seat.
⑵The man asked the lady put the dog on her ____.
⑶Finally the bus driver ____ the bus.
⑷The man took out a ____.
⑸Guess what the dog had in its ____.