These are Cara and Ben. They are twins (双胞胎). They are twelve. This is their bedroom. It's a nice room. There are two beds in the room. The yellow bed is Cara's and that green one is Ben's. The twins have one desk and two chairs. The chairs look the same. Cara's sweater is on his bed. Ben's coat is on his chair. Their clock, books and pencil-boxes are on the desk. Their schoolbags are behind the chairs.

判断对错.

三角形的面积等于平行四边形面积的一半

“以”字的意思和用法与“不以千里称也”一句相同的一项是（   ）

有位香港女士通过上网结交了一位异国网友，这位网友用十分关爱她，不断鼓励她等手段，骗取了她对他的信任，她把他当作了知心朋友，无话不说。这位异国网友见时机已成熟，于是，就打出要在中国投资办厂的幌子，向她借钱。当这位香港女士从银行中取了几万元美金准备给这位 网友时，她突然感觉到这事有点不对，于是，她立即向公安机关查询有关情况。经公安机关侦查，她的这位异国网友其实是一个国际诈骗团伙的成员。在上网同陌生人聊天时，要做到（    ）

①不轻易信任人家

②不随意泄露自己的个人信息

③尽量满足对方的要求

④能及时、准确地识别对方的虚假信息