After the successful launching of the Shenzhou 9, ______ the astronauts will work and live in Tiangong-1— the space lab module is ______ the whole nation care about.

A．where, what

B．what, that

C．that, how

D．how, what

发现有人员中毒，应立即将中毒人员抬出室外，置于暖和、空气新鲜并且空气流通的地方；将中毒人员仰卧，面部向上，松解领口、衣服扣及裤带越快越好。对呼吸困难者应做人工呼吸，给纯氧或含二氧化碳（）的氧气。

A.1%～3%

B.3%～5%

C.5%～7%

D.7%～9%