士族宗族的三大特点？

Most computer systems are (165) to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be (166) to an outsider attack by preventing (167) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (168) users. Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks. These attacks are usually (169) by tools referred to as Intrusion Detection Systems.

（168）处是（）

A.power

B.rights

C.authorized

D.common

―What do you think made Tom unhappy?

―       his new bicycle again.

A．As he lost

B．Lost

C．Losing

D．Because of losing

通常情况下，欲将一杯不饱和的蔗糖溶液变成饱和溶液，最适宜的方法是（　　）

A．加蔗糖

B．加水

C．升温

D．增大压强

对执行的说法错误的是（）

A．对被判处徒刑缓刑的罪犯，由公安机关予以考察

B．被假释的罪犯在假释考验期限内，由公安机关予以监督

C．对被判处管制、剥夺政治权利的罪犯，由公安机关执行

D．没收财产的判决，在必要时，人民法院可以会同公安机关执行

地下可溶性岩石(如石灰岩、盐岩)在含有二氧化碳、硫酸盐、氯等化学成分的地下水的溶解与侵蚀之下，岩石内部形成空洞，这种现象称为()。

A．岩溶

B．滑坡

C．冲沟

D．崩塌