下列句子中,加线成语使用恰当的一句是( )
A:我们是幸运的,风华正茂之时恰逢改革盛世,又怎能虚掷光阴呢?
B:2010年春晚结束后,全国观众经过一番评头品足,终于确定了获奖名单。
C:走私集团没费太大精力就把这些人都收买了,并使他们成为其中流砥柱。
D:2010年11月12日,第十六届亚运会在广州举行,羊城万人空巷,人们都守在自家电视机前,街上显得静悄悄的。
在下列各数:0.050050005…,49100 ,0.2,1π ,7 ,13111 ,273 中,无理数的个数是( )
选用所给句子完成对话。A: Have you ever heard about a fund-raising event called Oxfam-trailwalker?B: Yes. ____ A: Yes, it is. I am thinking of joining it. It’s a good chance to learn about working together.B: ____ A: People over 18 years old. ____ B: It's a difficult walk but I’m really interested in it. Do you think I can join the walk?A: ____ We can be in the same team.B: Oh, ____ Let's find another two members.