下列关于有机物的叙述正确的是 A．乙烯和苯都能使溴水褪色，褪色的原因相同 B．乙

— Ann is in hospital.

— Oh, really? I _____________ know. I _______________ go and visit her.

A．didn’t; will

B． don’t; will

C． don’t; would

D．didn’t; am going to

From the ________ look on his face, we know that the price of meat _________. [      ]

A. disappointed; has been gone up    

B. disappointed; has been raised   

C. disappointing; has gone up        

D. disappointing; has risen

OSPF路由选择协议生成路由表的算法是________。

什么叫基准？基准分为哪两大类？

与机械性眼外伤预后相关的因素有（）

A.损伤部位

B.损伤程度

C.伤后手术时机的选择

D.伤后视力情况

E.严重并发症的出现