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单项选择题
细菌的核酸是()
A.RNA
B.mRNA
C.DNA
D.RNA或DNA
E.DNA和RNA
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相关考题
单项选择题
An inverting amplifier and a noninverting amplifier are built using the same values of Rf and R1. Assuming that the op-amps being used in the two circuits have identical common-mode gain values, _______.
A.the inverting amplifier has the higher CMRR
B.the noninverting amplifier has the higher CMRR
C.the CMRR is the same for the inverting and noninverting amplifiers
D.None of the above
单项选择题
断开28113刀闸时,2811开关操作箱的L1灯是( )的。 A.
亮 B.
灭
单项选择题
革兰阴性菌脂多糖在()
A.细胞膜上
B.磷壁酸上
C.肤聚糖层上
D.外膜上
E.在脂蛋白上
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