下列不是脾病常见表现的是()
A.嗳气
B.内脏下垂
C.便溏
D.腹胀
E.出血
参考答案:A
How much time do you often spend _____ English every day?[ ]
A. to practise speaking
B. practising to speak
C. on practising to speak
D. practising speaking
感染鼠痘康复小鼠可以通过粪便(),成为传播感染的主要传染源。
A.长期排毒
B.定期排毒
C.短期排毒
D.偶尔排毒