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【单选题】
以下关于控制系统根轨迹法描述错误的是:A.
根轨迹法的分支数与开环有限零点数 m 和开环有限极点数 n 中的大者相等。
B.
当开环有限零点数 m 小于开环有限极点数 n 时，有 n-m 条根轨迹分支终止于无穷远处。
C.
实轴上某区域，若其右侧开环实数零、极点个数之和为偶数，则该区域具有根轨迹。
D.
一部分根轨迹分支向右移动则必定有一部分根轨迹分支向左移动。
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举一反三
【单选题】下列微生物的拉丁名书写正确的是( )
A.
产气肠杆菌 Enterobacter aerogenes
B.
单增李斯特菌 Listeria monocytogenes
C.
上面啤酒酵母 Saccharomyces Cerevisiae
D.
沙眼衣原体 chlamydia trachomatis
E.
青春双歧杆菌 bifidobacterium Adolescentis
【单选题】Such agents as clavulanic acid, sulbactam, or tazobactam are often added to some proprietary (manufactured) penicillin combination products. Which of the followings is the main reason for including th...
A.
Add antibiotic activity against Pseudomonas and many Enterobacter species
B.
Facilitate antibiotic penetration into the central nervous system and cerebrospinal fluid
C.
Inhibit cell wall transpeptidases
D.
Inhibit inactivation of penicillin by b-lactamase-producing bacteria
E.
Inhibit the normally significant hepatic metabolism of the penicillin
【单选题】Assume you have a gram negative bacterium that produces acid from lactose and cannot use citric acid as its sole carbon source. What is the bacterium?
A.
Shigella
B.
Salmonella
C.
E. coli
D.
Citrobacter
E.
Enterobacter
【单选题】The organisms, such as ( ), are very difficult to recover using routine culture media.
A.
Streptococcus anginosus
B.
Escherichia coli
C.
Enterobacter cloacae
D.
Mycobacterium tuberculosis
E.
Salmonella paratyphi A
【简答题】常见的机器人外部传感器有哪些?
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