鼻疖脓肿形成后的治疗可酌行（）
A.挖鼻等不良习惯
B.疖肿不适当挤压或早期切开
C.疖肿未加治疗
D.早期热敷
E.切开排脓
参考答案：E
根据课文内容填空。
The students are (1) the playground. They (2) (3) a PF lesson. (4) is their
teacher. He is (5) orders and the students are trying (6) (7) the orders.
1. (8) (9)____ a line. Let's (10)____ some exercise.
2. (11) __ your (12) together. Jump (13) and (14) ten (15) .
3. Put your hands (16) your head and turn (17) and (18) ten times.
4. Lie (19)_ your (20) and lift (21) your left leg and (22) it (23)_ your right
hand.
导致温室效应的气体是
A．氧气
B．二氧化碳
C．一氧化碳
D．二氧化硫
