下列有关中性粒细胞的免疫活性的叙述中,哪一项是错误的
A.具有趋化运动活性
B.具有吞噬效应
C.具有创伤修复作用
D.具有免疫调理作用
E.具有杀伤效应
参考答案:D
设备管理“四懂”:指:懂设备()、懂设备()、懂设备()、懂设备()。
On November 15, 2008, Grinell Construction Company decided to issue bonds to help finance the acquisition of new construction equipment. They issued bonds totaling $10000000 with a 6% coupon rate due June 15, 2028. Grinell has agreed to pay the entire amount borrowed in one lump sum payment at the maturity date. Grinell is not required to make any principal payments prior to maturity. What type of bond structure has Grinell issued()
A. Serial bonds.
B. Bullet maturity.
C. Redeemable bonds.