咽部发炎引起中耳炎，病菌由咽部到达中耳经过的结构是[ ]
A．外耳道
B．咽鼓管
C．喉
D．耳郭
答案：B
They are making too much noise here. Let's go ______.[ ]
A. somewhere quiet
B. anywhere quiet
C. quiet somewhere
D. quiet anywhere
简述自我意识的含义及其发展过程。
