交换场地，双方应在每盘的第（）等单数局结束后，以及每盘结束双方局数之和为单数时交换场地。
参考答案：1；3；5
根据句意，在相应的横线上，写出括号内所给单词的适当形式。
小题1:It is getting more and more ________ (pollute). We should do something to solve the problem.
小题2:I don’t like the persons whose clothes are ________ (tidy).
小题3:They designed a car ________ (special) for disabled people.
小题4:Here is a list of the early ________ (settle) names. They have lived there for 30 years.
性联遗传性寻常鱼鳞病的皮损特点（）
A.颈部的鳞屑大而显著
B.面部及耳部可有皮损
C.侵犯掌跖
D.可累及肘窝、腋窝及腘窝
E.可累及头皮
