每个蒲公英的种子都有一把小伞，以适应于 ( )
A．风传播
B．人为传播
C．水传播
D．动物传播
参考答案：A
利于颅内压增高患者代偿的情况是（）
A.发热
B.婴幼儿
C.病变位于颅中线附近
D.病变位于颅内大静脉附近
E.有颅内炎症
--Did you listen to the speech?
--- No, we ______ it. But we had a lot of traffic on our way.
A．could have attended
B．must have attended
C．could attend
D．shouldn't have attended
