问答题

公务员考试常识题库及答案（第25001-25500题）-4

答案： 25126、兵马俑全是什么的制成品？正确答案：陶土,
25127、哪一项不是秦始皇为巩固秦朝推行的措施？正确答案...

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单项选择题

The NMR spectra of the same compound were determined on a 60 MHz instrument and a 300 MHz instrument. The resonance frequencies of the same hydrogen nuclei measured on both instruments are ; The H-H coupling constants of measured on both instruments are.
A、the same, different;
B、the same, the same;
C、different, different;
D、different, the same.

多项选择题

混凝土配合比设计时必须按耐久性要求校核( )。 A.
砂率 B.
单位水泥用量 C.
浆骨比 D.
水灰比 E.
石子最大粒径