下列是穆罕默德宗教和政治活动的大事，按时间先后顺序排列正确的是(     ) 

①出走麦地那②成为政治、宗教领袖③开始在麦加传教④基本统一阿拉伯半岛       

A: What a fine day today! ____?

B: That sounds like a good idea. ____?

A: Let's go to the little Hill.

B: Shall we take the bus there?

A: ____. It's not very far.

B: That will be OK. I'll ride my new bike my father bought me for my birthday last month.

A: ____?

B: Let's ask Mary and Jack to go with us. They planned to go last Sunday but it rained.

A: Good! I'm sure they will be happy to.

B: Have you got any idea what we are doing there?

A: ____.

B: That will be fun.

如图，一质点以速度v₀从倾角为θ的斜面底端斜向上抛出，落到斜面上的M点且速度水平向右．现将该质点以2v₀的速度从斜面底端朝同样方向抛出，落在斜面上的N点．下列说法正确的是（   ）

下列物质的用途中,与该物质的化学性质无关的是 （   ）