对系统安全性的威胁有哪几种类型？

-- It seems that she doesn't like the dinner very much.

-- ______. In fact, she's been on a diet following the doctor's advice.

A．You're right

B．So she does

C．Never mind

D．Not really

Max could smell the rain coming．And it did．Suddenly the lightning flashed through the

clouds, nearly ______ him.

A．to blind

B．blinded

C．blinding

D．having blinded

A. 实意动词        B. 助动词          C. 情态动词    D. 系动词

小题1:The owner can’t be a boy. 

小题2:Everyone has his or her own ideas.

方程|z|=ax+l有一个负根且无正根，则a的取值范围是[ ]

A.a>-1

B.a=1

C.a≤1

D.a≥1

患者，女，52岁，多个关节疼痛有两年余，且疼痛游走不定，局部灼热红肿，痛不可触，得热则舒，舌红，苔黄，脉滑数。

若见口渴心烦者可加（）

A.银柴胡、地骨皮

B.赤芍、黄连

C.知母、石膏

D.玄参、麦冬

E.生地、薄荷