此患者应首先做下列哪项检查
A.CA125
B.HCG
C.AFP
D.CEA
E.SF(血清铁蛋白)
参考答案:A
It is everybody’s desire that every effort___________ to reduce the pollution in our city.
A.was made
B.be made
C.will be made
D.would be made
微差爆破时,微差间距时间的选择应保证:①()及网路造成破坏;②每个炮孔前面有自由面。