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【单选题】
标准公差是指A.
国标规定的公差
B.
设计给定的公差
C.
尺寸偏差
D.
尺寸误差
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【简答题】I recently heard a story about a famous scientist who had made several very important medical breakthroughs（突破）. He was being interviewed by a reporter who asked him he thought he was able to be so mu...
【单选题】下列各组缓冲溶液中，缓冲容量最大的是( )。
A.
0.5mol·L -1 NH 3 和0.1mol·L -1 NH 4 Cl
B.
0.1mol·L -1 NH 3 和0.5mol·L -1 NH 4 Cl
C.
0.1mol·L -1 NH 3 和0.1mol·L -1 NH 4 Cl
D.
0.3mol·L -1 NH 3 和0.3mol·L -1 NH 4 Cl
【简答题】I recently heard a story about a famous scientist who had made several very important medical breakthroughs（突破）. He was being interviewed by a reporter who asked him 1 he thought he was able to be so ...
【多选题】假设需要在内存分配1KB存储空间,则其相应的地址段可选用______。
A.
000H——FFFH
B.
100H——4FFH
C.
100H——500H
D.
A00H——DFFH
【简答题】完形填空。 I recently heard a story about a famous scientist who had made several very important medical breakthroughs.He was being interviewed by a reporter who asked him __ 1 __ he thought he was able to...
【单选题】3-下列溶液用酸碱滴定法能准确滴定的是 -( ) (A) 0.1 mol/LHF (pKa = 3.18) (B) 0.1 mol/L HCN (pKa = 9.21) (C) 0.1 mol/LNaAc [pKa(HAc) = 4.74] (D) 0.1 mol/L NH 4 Cl [pKb(NH 3 )= 4.75]
A.
0.1 mol/LHF (pKa = 3.18)
B.
0.1 mol/L HCN (pKa = 9.21)
C.
0.1 mol/LNaAc [pKa(HAc) = 4.74]
D.
0.1 mol/L NH4Cl [pKb(NH3)= 4.75]
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