题目内容

5. Low hemoglobin values may indicate disease of the liver or spleen.

A. 对
B. 错

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TASK 3: Translate the following paragraph into Chinese.The cells that circulate in the bloodstream are generally divided into three types: white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes). Abnormally high or low counts may indicate the presence of many forms of disease, and hence blood counts are amongst the most commonly performed blood tests in medicine, as they can provide an overview of a patient's general health status. A CBC is routinely performed during annual physical examinations in some jurisdictions.

指示剂在某溶液中显碱色,则溶液为

A. 酸性
B. 碱性
C. 中性
D. 酸碱性不能确定

某弱酸型指示剂在pH<4.5溶液中显蓝色,在pH>6.5溶液中显黄色,在4.5<pH<6.5溶液中呈过渡色,此指示剂的pKa 约为

A. 5.49
B. 4.49
C. 4.15
D. 5.15

按照酸碱质子理论,下列物质属于两性的物质是

A. H2O
B. Na2CO3
C. NH4Cl
D. NaCl

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