三角形中最多有（ ）个直角或钝角，最少有（ ）个直角或钝角；最多有（ ）个锐角，最少有（ ）个锐角．
1；0；3；2
填入对话中所缺的词，每空一词。
A: Excuse 1 , is 2 your pencil?
B: Yes, it is.
A: 3 you are.
B: 4 is your pencil case?
A: It's 5 the desk. It's 6 to 7 dictionary. 8 new.
B: Oh, 9 very nice.
A: Can I 10 a look at your pencil case?
B: Yes, of course.
远动装置的调制解调器一般采用（）方式。
A.调频
B.调相
C.调幅
D.其他
of course.