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【单选题】
Z2~40.正弦交流电压的有效值是10V,角频率是ω,初相位是-30°,该电压的解析式是( )V。A.
u=10sin(ωt+30°)
B.
u=10√2sin(ωt-30°)
C.
u=5√2sin(ωt+30°)
D.
u=10√2sin(ωt+30°)
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【简答题】用描述法表示平面内不在第一与第三象限的点的集合为（ ）。
【单选题】The number of WBC in normal adult ’ s blood is
A.
(3.5 ～ 5.0)×10 12 个 /L
B.
(3.5 ～ 5.0)×10 12 /mL
C.
(4.0 ～ 10)×10 9 /L
D.
(4.0 ～ 10)×10 9 /μL
E.
(0.4 ～ 1.0)×10 12 /L
【单选题】两台 MSR 路由器通过广域网连接并通过 RIPv2 动态完成了远端路由学习,此时路由表已经达到稳定状态,那么此刻起在 45 秒之内,两台路由器广域网之间一定会有如下哪些报文传递?
A.
RIP Request message
B.
RIP Response message
C.
RIP Hello time message
D.
RIP Update message
【简答题】Kincaid looked at his watch: eight-seen. The truck started on the second try, and he backed out, shifted gears, and moved slowly down the alley under hazy sun. Through the streets of Bellingham h...
【单选题】In normal adult ,the lumbar puncture is most often performed at which of the follow interspace
A.
T 12-L1
B.
L1-L2
C.
L2-L3
D.
L3-L4
E.
L4-L5
【单选题】Let’s have a ________ at that second game. I’ll ________ for you.
A.
look; see
B.
read; look
C.
watch; read
D.
look; read
【简答题】绝对黑体温度升高一倍时,其辐射能力最大值所对应的波长就变为原来的 。
【单选题】The case ______ a lot of things, ______ a second-hand watch.
A.
included; contained
B.
included; containing
C.
contained; included
D.
contained; including
【简答题】用描述法表示平面内不在第一与第三象限的点的集合为______．
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