典型失神发作EEG特点?
参考答案：
发作时呈双侧对称3Hz棘—慢波综合波，发作可被过度换气诱发，发作间期也可有同样的或较短的阵发活动，背景活动正常。
-- In the countryside you can enjoy fresh air, blue sky and quiet surroundings.
--- _______ more and more retired people are escaping from the crowded city.
A．It is no wonder
B．It is no doubt
C．There is no need
D．There is no possibility
中药的剂量是指（）
A.单味药成人一日量
B.单味药小儿一日量
C.单味药成人一次量
D.单味药小儿一次量
E.一剂药的用量
