慢性腹泻病程为()
A.病程2周以内
B.病程2周~2个月
C.病程2个月以上
D.病程3个月以上
E.病程半年以内
参考答案:C
What makes the space shuttle is that it takes off like a rocket but lands like an airplane.
A.exceptional
B.strange
C.unique
D.rare
混凝土梁按其施工方法可分为()。
A.现浇梁
B.预制梁
C.钢筋混凝土梁
D.预应力混凝土梁
E.预制现浇叠合梁