哪一种白内障最常见（）
A.老年性白内障
B.先天性白内障
C.外伤性白内障
D.并发性白内障
E.代谢性白内障
参考答案：A
(2013·亳州模拟) difficult and challenging the task may be, we must finish it on time, because there is a possibility we’ll be fired if we can’t fulfill the task on time.
A．Whatever; that
B．However; that
C．Whatever; which
D．However; as
何为“清初四僧”．他们在艺术上的共同特点是什么？
