某技师塑瓷时由于反复烘烤,造成瓷粉透明度下降,其原因是()
A.瓷粉熔点升高
B.瓷粉热膨胀系数增大
C.碳酸盐分解
D.磷酸盐分解
E.瓷粉熔点降低
参考答案:C
Which of the following statements concerning the epicardium is TRUE
A.It is continuous with the endocardium
B.It is the visceral pericardium
C. It possesses modified cardiac muscle cells
D.It functions to increase intraventricular pressure
E.It possesses cardiac muscle cells
A computer program, or just a program, is a sequence of ______, written to perform a specified task with a computer.
A.languages
B.instructions
C.programs
D.functions