A、Q与 
的数值始终相等。
B、Q与 的数值不一定相等。
C、 的数值不随反应的进行而变化。
D、Q的数值随反应的进行而变化。
喵查答案：Q与 的数值始终相等。
下列关于反应商Q的叙述中错误的是（ ）。
-
做对照实验和空白实验，校正仪器和方法都可以减免和消除系统误差。 -
实验中三次平行测定的结果越接近，说明测定的准确度越高。 -
直接法和间接法配制溶液时，都必须用分析天平准确称量试剂。 -
滴定管读数的绝对误差为±0.02mL，如果滴定分析要求分析结果的相对误差小于0.1%，结合实际，实验操作中一般要求滴定剂的用量为20至30mL
- To demonstrate the potential of this new approach, two filler geometrics ___________ (use): sandglass and cheese segment. (在判断该句在摘要的哪部分内容中出现的基础上，填入所给动词的适当形式)
- This paper____________ (investigate) a new strategy for radio resource allocation applying a non-orthogonal multiple access (NOMA) scheme. (在判断该句在摘要的哪部分内容中出现的基础上，填入所给动词的适当形式)
- Both descriptive abstracts and informative abstracts present the information of the original work in an objective and neutral tone.
- A good scientific abstract includes all the key information of the original work.
- Technical jargons, colloquialisms and details can be used in Scientific abstract.
- People should avoid using words or terms in the title as keywords.
- “This motivated us to explore the use of DNNs in the context of photo editing.” is an acceptable sentence in a scientific abstract.
- A good scientific abstract should be well-organized. The several sections it consists are arranged sequentially: introduction, method(s), result(s) and conclusions.