安全阀校验时,可以使用()介质。A.氮气 B.脱盐水 C.空气 D.煤油

题型:多项选择题

问题:

安全阀校验时,可以使用()介质。

A.氮气

B.脱盐水

C.空气

D.煤油

考点:石油化工设备知识考试石油化工设备知识考试题库
题型:多项选择题

除垢剂

题型:多项选择题

短文改错(共10小题;每小题1分,满分10分)

       假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处,每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1.每处错误及其修改均限一词。

            2.只允许修改10处,多者(从第11处起)不计分。

Dear John,

     I am extremely sorry to tell you that I am unable to go to your party on this Sunday. It is very

kind for you to invite me to your house and I really look forward to going to your party and share

your happy experience abroad. Manny to my regret, I will be absent from your party owing to the

fact that the College Entrance Exam is just around corner, for which I am now really busy preparing.

     What's more, I have caught a bad cold lately and I was really not myself.

     Anyway, we will have many more chances to get together. Shall we make it after the Exam?

     I am true sorry. I hope you will forgive me and receive my sincere apologies. I look forward to

your reply.

                                                                                                                              Yours truly,

                                                                                                                                  Li Hua

                                                                                                                                                       

题型:多项选择题

She is          being pleased about it: she is very angry.

A.free from

B.free of

C.out of

D.far from

题型:多项选择题

尿亚硝酸盐试验检出率受哪些因素影响?

题型:多项选择题

某思想家说:“我之出而仕也,为天下,……为万民,非为一姓也……”他所反对的是()

A.民主共和制

B.中央集权制

C.专制主义制度

D.君主立宪制

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