可产生Ig的细胞是
A．Th1细胞B．B细胞C．NK细胞D．CTLE．Th2细胞
参考答案：B
All of the following factors affects the firm's P/E ratio EXCEPT:（）
A. the expected interest rate on the bonds of the firm.
B. growth rates of dividends.
C. expected dividend payout ratio.
试分析起动后怠速工况下基本点火提前角的控制方法？
