确诊流脑的依据是()
A．高热、头痛、呕吐
B．皮肤黏膜有淤点、淤斑
C．有脑膜刺激征
D．脑脊液呈典型化脓性脑膜炎改变
E．以上都不是
参考答案：E
若要“向文本文件尾增加数据”，在fopen函数中应使用的文件方式是 ( )
A．"ab+"
B．"a"
C．"ab"
D．"a+"
—Selina, are you____________ member of the swimming club?
—No, but I joined _________art club last month.
A．a; a
B．the; a
C．the; an
D．a; the
