【单选题】The passage shows that alchemy in the medieval time ______.
A.
established modern chemistry
B.
cured all the diseases
C.
turned base metals to gold
D.
was taken as somewhat justifiable
【单选题】The medieval church condemned man's partaking in ______ pleasures.
【简答题】The begins of the modern chemistry laboratory go back to the workrooms of medieval alchemists.
【判断题】字符串常量"12345"在内存中占用6个字节的单元空间。
【单选题】气相色谱用内标法测定A组份时,取未知样1.0μL,进样得组分A的峰面积为3.0cm2,组分B的峰面积为1.0cm2;取未知样2.0000g,标准样纯A组分0.2000g,仍取1.0μL进样,得组分A的峰面积为3.2 cm2,组分B的峰面积为0.8 cm2,则未知样中组分A的质量百分含量为( )
【单选题】原有中枢神经系统疾病患者如癫痫及癫痫病史者应避免使用的是:
【单选题】朱子家训》中说:“黎明即起,洒扫庭除,要内外整洁。即昏便息,关锁门户,必亲自检点。„„”古人讲究从细节培养生活习惯,有了这些习惯,身体和精神就能保持起码的健康。这说明习惯影响人的( )