酸性气中含氨高的原因有哪些？
参考答案：
1．硫化氢排放量大；
2．冷进料小；
3．塔顶温度高。
中幼红细胞的胞浆呈嗜多色性的原因是（）
A.细胞衰老
B.RNA等嗜碱性物质占绝对比例
C.细胞浆内血红蛋白尚未形成
D.细胞浆中含有细小嗜碱性颗粒
E.血红蛋白合成逐渐增多，RNA逐渐减少
Which of the following statements is NOT true of nuclear plants in Britain a. They have caused a series of power failures recently. b. They have betrayed trust of the general public. c. They need improvement in management. d. They demand promotion of security awareness.
