饱和热水塔若液位()将增大系统压降,有时还会造成半水煤气带水,引起触媒温度骤变,多次带水将使触媒粉化和系统阻力增大。
A.过高;
B.过低;
C.波动;
参考答案:A
_____ I believe, and you will find Tom is very outgoing. [ ]
A. Having a talk with the student
B. One talk with the student
C. Given a talk with the student
D. If you have a talk with the student
双眼皮是显性性状,单眼皮是隐性性状.一对双眼皮夫妇的基因组成都是RR,那么他们生出一个单眼皮孩子的可能性是( )
A.100%
B.50%
C.25%
D.0