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【单选题】
在如图所示OCL电路中，已知输入电压ui为正弦波，三极管的饱和管压降均为2V；当ui＝0V时，uo应为0V。若电路产生交越失真，则正确的调节方法是（ ）。【图片】A.
增大 R 1
B.
增大 R 2
C.
增大 R 3
D.
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举一反三
【单选题】What is true about the apartments Mies built on Chicago s Lake Shore Drive?
A.
They ignored details and proportions.
B.
They were built with materials popular at that time.
C.
They were more spacious than neighboring buildings.
D.
They shared some characteristics of abstract art.
【单选题】What is true about the apartments Mies building Chicago's Lake Shore Drive?
A.
They ignored details and proportions.
B.
They were built with materials popular at that time.
C.
They were more spacious than neighboring buildings.
D.
They shared some characteristics of abstract art.
【单选题】下列各组分子中,中心原子均发生 sp 杂化,分子空间构型均为直线形的是( )。
A.
H 2 S、CO 2
B.
CS 2 、SO 2
C.
HgCl 2 、CS 2
D.
H 2 O、HgCl 2
【简答题】CS 2 分子空间构型是直线形, C原子以2个sp杂化轨道分别和2个硫原子形成共价键。CS 2 分子是 分子; Cl 2 O分子的空间构型是V形,O原子以2个 杂化轨道分别和 2个Cl原子形成共价键。Cl 2 O分子是 分子。
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