烟机出口温度高的原因是什么？
参考答案：
1）烟机入口温度过高2）烟机冷却蒸汽不足或中断
一 Now some parents deny _____ to their children, and have become their slaves.
一 But this problem does not cause concem of the whole society.[ ]
A. nothing
B. everything
C. something
D. anything
人类基因组中SNP约有
A．1000万个
B．300万个
C．800万个
D．100万个
E．500万个
