【单选题】As shown in the circuit, the circuit is in a steady state before the switch K is opened, and the switch K is turned on at t=0. The initial vlotage value of the inductance u(0+) is equal to ________.Ch...
【判断题】人工燃气是指以固体、液体 ( 包括煤、重油、轻油等 ) 为原料经转化制得 ,符合国家相关标准的可燃性气体
【判断题】等级制度是从组织的最高权力机构直至最低层管理人员的领导系列。
【简答题】是从组织的最高权力机构直至最底层管理人员的领导系列。
【多选题】以下各种循环叙述正确的是
A.
丙氨酸一葡萄糖循环是肌肉组织氨的主要运输形式
C.
嘌呤核苷酸循环是肌肉等组织氨基酸脱氨的主要途径
D.
柠檬酸一丙酮酸循环促进了乙酰CoA出线粒体合成脂肪酸
【单选题】In which circuit all devices could be controlled by one switch ?
C.
series parallel circuit
【多选题】下列说法正确的是
A.
燃气的种类很多,主要有天然气、人工燃气、 液化石油气 和沼气、煤制气
B.
人工燃气是指以固体、液体 ( 包括煤、重油、轻油等 ) 为原料经转化制得 ,符合国家相关标准的可燃性气体
C.
天然气的主要成分是甲烷, 空气中浓度达到 5% 时,可使人窒息死亡
D.
我国固定式可燃气体报警器市场 只有三分之一 分布在煤矿领域
【单选题】In which circuit all devices could be controlled by one switch ?( )
【单选题】What type of switch would be used to turn on a single-wire circuit when the switch is pressed (activated) by the pilot?
A.
Single-pole, single-throw (SPST), two-position normally open (NO)
B.
Single-pole, single-throw (SPST), single-position
C.
Single-pole, double-throw (SPDT), two-position
D.
Single-pole, double-throw (SPDT), single-position normally open (NO)
【单选题】As shown in the circuit, the circuit has been in a steady state before the switch is opened, and the switch is turned on at t=0. The initial voltage value of the resistor of 2Ω is u(0+)=________V. Cho...