老年人疾病特点是（）
A.起病隐匿
B.心理问题多
C.病情进展快
D.多种疾病同时存在
E.临床表现往往不典型
参考答案：A, C, D, E
3.4×2.5的积有两位小数。[ ]
_______ you have got such a good chance, you’d better make full use of it.
A．Now that
B．Although
C．As soon as
D．Even if
