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【单选题】
下列有关定量实验的叙述中，正确的是（ ）
A.
．配制500 mL 1 mol?L -1 稀硫酸实验中，稀释后立即进行后续各项操作，所配溶液浓度偏小
B.
.配制100 mL 5 mol?L -1 氯化钠溶液实验中，定容时仰视读数，所配溶液浓度偏大
C.
.用标准盐酸滴定待测NaOH溶液的实验中，使用碱式滴定管开始平视，后来俯视读数，所测NaOH溶液浓度偏大
D.
中和热测定实验中，大、小烧杯之间未填满碎塑料泡沫所测结果偏大
参考答案：
参考解析：
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【多选题】有关定性研究的描述正确的是?
A.
描述的方法是用文字
B.
研究对象是不同事物、现象的意义及特征
C.
研究的本质是归纳——从特殊事例中归纳出一般的原理
D.
研究的本质是演绎——从一般原理推广到特殊事例
【单选题】Part ADirections: Read the following four texts．Answer the questions below each text by choosing A, B, C or D．(40 points)The long year of food shortage in this country have suddenly given way to appar...
A.
The abundant food supply is not expected to last
B.
Britain is importing less food
C.
Despite the abundance, food prices keep rising
D.
Britain will cut back on its production of food
【单选题】The long year of food shortage in this country have suddenly given way to apparent abundance. Stores and shops are choked with food. Rationing (定量供应 ) is virtually suspended, and overseas suppliers ha...
A.
the fall in world food prices would benefit British food producers
B.
an expansion of food production was at hand
C.
British food producers would receive more government financial support
D.
it looks depressing despite government guarantees