属于择期手术的疾病是()。
A.肝癌
B.胃溃疡
C.脾破裂
D.急性阑尾炎
E.嵌顿疝
参考答案:B
Choosing the right circle of the friends will ____ us a lot of troubles, heartaches and possibly a life of deep regret.
A.save
B.share
C.keep
D.bring
六大类酶