体积相同的甲乙两容器中,分别充入1molA和1molB,在相同温度下发生反应: 2A(g)+B(g) 2C(g) 并达到平衡,甲容器保持体积不变, C的体积分数为m%;乙容器保持压强不变,C的体积分数为n%,则m和n的正确关系为
Jenny nearly missed the flight______ doing too much shopping.
The CDs are on sale! Buy one and you get ______ completely free.
Progress______ so far very good and we are sure that the work will be finished on time.
Charles was alone at home, with_______ looking after him.
It is often ______ that human beings are naturally equipped to speak.