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【单选题】
图示电路换已达稳态,在t=0时断开开关S,则该电路( )。A.
电路有储能元件L,要产生过渡过程
B.
电路有储能元件且发生换路,要产生过渡过程
C.
因为换元件L的电流储能不发生变化,所以该电路不产生过渡过程。
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举一反三
【单选题】A list signal of one white light indicates that the vessel is （）.
A.
on an even keel
B.
listing about 1° to the side the light is displayed on
C.
listing over 5° With the light displayed on the high side
D.
listing，and the chutes should be directed to the side where the light is displayed
【单选题】A buoy marking a wreck will show a(an) ______.
A.
white light FL (2) and a topmark of 2 black spheres
B.
occulting green light and may be lettered
C.
yellow light and will be numbered
D.
continuous quick white light and may be numbered
【单选题】On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector ______.
A.
indicates the limits of the navigable channel
B.
indicates a danger area
C.
is used to identify the characteristics of the light
D.
serves no significant purpose
【单选题】(White and black) light, (if mixing) (in) the right proportion, (will show) us grey.
A.
White and black
B.
if mixing
C.
in
D.
will show
【单选题】下列关于髑置权的表述，错误的是( )。
A.
留置权只能在动产上产生
B.
如果债权未到清偿期，债权人不能产生留置权
C.
债权人应当与债务人在合同中约定，债权人留置财产后，债务人应当在不少于2个月的期限内履行债务
D.
留置担保的范围包括主债权及利息、违约金、损害赔偿金，留置物保管费用和实现留置权的费用
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