发病已5日的急性胰腺炎，对诊断有帮助的检查是( )
A．血清正铁血白蛋白
B．血钙
C．血清脂肪酶
D．血清淀粉酶
E．尿淀粉酶
参考答案：C
句型转换（5小题，每空0.5分，共5分）
小题1: Tom rides his bike to school every day. (变同义句)
Tom goes to school every day.
小题2:Are you from Beijing?（改为同义句）
_______ you ______ from Beijing?
小题3:She has to do her homework on weekend.(改为一般疑问句)
______she ______to do her homework on weekends?
小题4:It is 20 kilometers from here. (对画线部分提问)
is it from here?
小题5:I like elephants because they are friendly.(划线提问)
_________ _________you like elephants?
指数吸收定律中，其线性吸收系数为（）
A.光电吸收系数
B.康普顿吸收系数
C.电子对吸收系数
D.上述三种吸收系数之和
E.上述三种吸收系数之差
