水逆证呕吐的特点是（）
A.口渴欲饮，饮后即吐
B.吐利并作
C.朝食暮吐
D.吐物酸腐
E.朝食暮吐，暮食朝吐
参考答案：A
在调幅波的各分量中，只有两个（）携带信息。
Would you please read the letter and ________ your classmates?[ ]
A. pass it on to
B. pass on it to
C. pass it on
D. pass on it
