皮皮学，免费搜题
登录
搜题
【单选题】
以下用盐酸二铵分光光度法测定NOx的说法,正确的是
A.
当校准曲线的斜率达不到要求时，应重新自己制吸收液
B.
当校准曲线的截距α达不到要求时，应重新配制吸收液亚硝酸纳标准溶液
C.
测定NOx时540nm处测试吸光度
D.
采样前若发现带来的吸收液已呈棕色，说明吸收液受光照或暴露在空气中吸收空气中的NOx所致
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】Möchten Sie eine Hose? - Ja, dies hier, bitte.
A.
e
B.
en
C.
er
查看完整题目与答案
【单选题】I’m hungry. I would like ______ a large bowl of dumplings.
A.
eating  
B.
eat
C.
to eat D eats
查看完整题目与答案
【单选题】How should the teacher deal with students‘ writing errors?
A.
Teachers should limit students to take risks to use new vocabulary and structures.
B.
Teachers should often show negative attitude towards students' writing errors.
C.
Teachers should make corrections for all the writing errors of students.
D.
Teachers should underline the errors and leave them for students to correct themselves.
查看完整题目与答案
【单选题】银行结算凭证是（ ）。
A.
一次凭证
B.
二次凭证
C.
累计凭证
D.
汇总原始凭证
查看完整题目与答案
【判断题】不使用 static 修饰符声明的字段定义了一个实例字段 (instance field)。类的每个实例都为该类的所有实例字段包含一个单独副本。
A.
正确
B.
错误
查看完整题目与答案
【单选题】I'm hungry.I would like to have nice to eat _____. [     ]
A.
any
B.
anything
C.
something
D.
some
查看完整题目与答案
【单选题】_I’ve had enough bread. Would you like _____? _ No, thanks. I’m getting _______. I should eat ______ food.
A.
One more, fat and fatter, fewer
B.
some more, fatter and fatter, fewer
C.
some more, fatter and fatter, less
D.
another more, fat and fat, less
查看完整题目与答案
【单选题】Dieses Jahr möchten wir ein neues Auto kaufen, _____ wir oft sparen müssen.
A.
wofür
B.
dafür
C.
darum
查看完整题目与答案
【简答题】请翻译下列句子:Wir möchten bitte bezahlen.
查看完整题目与答案
【单选题】-- Would you like to have dinner with me? -______ Where shall we eat?
A.
Sorry, I’m busy.
B.
I’m afraid I can’t.
C.
I’d love to.
D.
Good night!
查看完整题目与答案
相关题目：
【单选题】Möchten Sie eine Hose? - Ja, dies hier, bitte.
A.
e
B.
en
C.
er
查看完整题目与答案
【单选题】I’m hungry. I would like ______ a large bowl of dumplings.
A.
eating  
B.
eat
C.
to eat D eats
查看完整题目与答案
【单选题】How should the teacher deal with students‘ writing errors?
A.
Teachers should limit students to take risks to use new vocabulary and structures.
B.
Teachers should often show negative attitude towards students' writing errors.
C.
Teachers should make corrections for all the writing errors of students.
D.
Teachers should underline the errors and leave them for students to correct themselves.
查看完整题目与答案
【单选题】银行结算凭证是（ ）。
A.
一次凭证
B.
二次凭证
C.
累计凭证
D.
汇总原始凭证
查看完整题目与答案
【判断题】不使用 static 修饰符声明的字段定义了一个实例字段 (instance field)。类的每个实例都为该类的所有实例字段包含一个单独副本。
A.
正确
B.
错误
查看完整题目与答案
【单选题】I'm hungry.I would like to have nice to eat _____. [     ]
A.
any
B.
anything
C.
something
D.
some
查看完整题目与答案
【单选题】_I’ve had enough bread. Would you like _____? _ No, thanks. I’m getting _______. I should eat ______ food.
A.
One more, fat and fatter, fewer
B.
some more, fatter and fatter, fewer
C.
some more, fatter and fatter, less
D.
another more, fat and fat, less
查看完整题目与答案
【单选题】Dieses Jahr möchten wir ein neues Auto kaufen, _____ wir oft sparen müssen.
A.
wofür
B.
dafür
C.
darum
查看完整题目与答案
【简答题】请翻译下列句子:Wir möchten bitte bezahlen.
查看完整题目与答案
【单选题】-- Would you like to have dinner with me? -______ Where shall we eat?
A.
Sorry, I’m busy.
B.
I’m afraid I can’t.
C.
I’d love to.
D.
Good night!
查看完整题目与答案