近年来，建筑装饰材料进入家庭，调查发现有些装饰程度较高的居室中，由装饰材料缓慢释放出来的化学污染物浓度过高，影响健康，这些污染物是( )
| A．二氧化碳 | B．氢气 | C．甲醛、苯等有机物 | D．氮气 |
相关试题
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A．Go ahead | B．Yes, my pleasure |
C．Yes, I do | D．Come on |
粤公网安备 44130202000953号