气体燃料是指（）的燃料。
A、始终是气态；
B、在常温常压下为气态；
C、所有成分均可燃；
D、燃烧的产物只有水。
参考答案：B
胡 * * 同志要求组织部门坚持公道正派原则，树立公道正派形象，提出的“四个必须、两个满意”的内容是什么？
A: How annoying! I can't figure out a solution to this problem. Can you help me B: ______
A．Why don't you do it yourself
B．OK. Though it's beyond me. Let me try.
C．You shouldn't feel annoyed. After all, it's your own problem.
D．Well, I'm afraid I can't at the moment.
