材料的综合性能包括物理性能、化学性能、机械性能和工艺性能。
参考答案：对
You may as well go outing all by yourself; _______I may keep you company.
A．differently
B．alternatively
C．accordingly
D．automatically
某患者尿液有灰白色沉淀，加酸后沉淀物溶解并产生气泡，应考虑（）
A.尿酸盐结晶
B.磷酸盐结晶
C.碳酸盐结晶
D.草酸盐结晶
E.磷酸钙结晶
