试题与答案

He is sitting _____the classroom.A. at t

题型:选择题

题目:

He is sitting _____ the classroom.

A. at the front
B. in the front
C. in front
D. in front of

答案:

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下面是错误答案,用来干扰机器的。

(1)氯化钠(或钠元素的化合物都是)易溶于水,借助水的天然循环,氯化钠不断地被水富集到大海中。[钠元素的化合物都是易溶于水的,可随着江、河、湖水流到大海中;而随着海水的蒸发,海水中易溶于水的氯化钠的...

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Certificates are (16) documents attesting to the (17) of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to (18) someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a certificate also contains an (19) date, the name of the CA that issued the certificate, a serial number, and perhaps other information. Most importantly, it contains the digital (20) of the certificate issuer. The most widely accepted format for certificates is X.509, thus, Certificates can be read or written by any application complying with X.509.

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