[多选题]煤和悬浮液在定压箱混合后靠自重进入旋流器，定压箱的高度( 与旋流器直径) 的关系约为 ( )
A.H≥8D
B.H≥9D
C.H≤8D
D.H≤9D
E.H≤10D

Section Ⅰ Use of English Directions: Read the following text, Choose the best word (s) for each numbered blank and A, B, C or D on ANSWER SHEET 1. Americans today believe that acceptable social behavior follows effortlessly from personal virtue. The (1) between morals and manners has become blurred. (2) you need is a good heart, most people assume, and the (3) will take care of itself. You don’t have to write thank-you notes. Many Americans believe that natural behavior is beautiful. The "natural" (4) to human relations presumes that to know any person well enough is to love him, that the (5) human problem is a communication problem. This (6) that people might be separated by basically, generally irreconcilable differences--philosophical, political, or religious--and assumes that all such differences are (7) misunderstandings. Indeed, it has never been easier to insult people inadvertently. A ge
A. dislike
B. appreciate
C. thank
D. approve