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【单选题】
下列部件使换挡平顺的是( )。A.
Elbow
B.
Synchronizer
C.
Adaptor
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举一反三
【单选题】图甲是模拟调光灯.电源电压为4.0V;小灯泡额定电压为2.5V,电流随电压变化的I-U图象如图乙所示,小灯泡两端电压达到0.4V时“刚亮”;铅笔芯长15cm、阻值为30Ω,其阻值与长度成正比.回形针A固定在铅笔芯右端,回形针P可以在铅笔芯上自由滑动,该调光灯在使用时,以下说法错误的是( )
A.
闭合开关,移动P能连续调光
B.
闭合开关,P滑到距A点10cm处,小灯泡的实际功率为0.15W
C.
在距A点2.5cm处做标记,可以提醒P向A滑过此处,小灯泡将不安全
D.
小灯泡工作时,从“刚亮”到正常发光,实际功率变化范围为0.048W~0.75W
【简答题】The conversation is most probably taking place between a(n)____1_____ and a(n)____2_____. Kate is from ______3____Company. Leo cannot decide between Yangtian and Kaitian _______4___________.
【单选题】电路如 图 若电容 C 已充有电压 Us ,将开关 S 向“ 1” 闭合,电容器立即对电阻 R 进行放电。 Multisim 仿真环境下建立一阶 RC 电路,观测放电过程 R=15 kΩ C=100μF Us=10V t=0.5s 时,观测到的电容两端电压瞬时值为( )
A.
6.27V 左右
B.
2V 左右
C.
10V 左右
【单选题】Greeting is a(n) _______ _______to a conversation when meeting people after some time.
A.
good subject
B.
proper start
C.
interesting beginning
D.
not necessary
【单选题】A client is about to have arterial blood gases drawn, and the nurse explains what an Allen's test is. What comment shows that the client understands the nurse's explanation?
A.
"Blood is drawn from the ulnar artery."
B.
"I know I have to lie down while blood is drawn."
C.
"This test is done to ensure adequate collateral circulation."
D.
"Direct pressure has to be placed over the site for 15 minutes after blood is drawn."
【简答题】某施工场地方格网及角点自然标高如题图示,方格网边长a=40m,设计要求泄水坡度沿长度方向为2‰,沿宽度方向为1‰,是确定场地设计标高(不考虑土的可松性影响),并计算挖填土方工程量。
【单选题】[单选题]测量噪声时,测点数要根据机床大小而定,一般以每隔()定一点进行测量,以终点所测得噪声的最大值作为机床的噪声。
A.
0.5m
B.
1m
C.
1.5m
D.
2m
【单选题】According to Dr. Jeol Hiderbrand what accounts for his ageless energy?
A.
His ancestors.
B.
His parents.
C.
Heredity.
D.
Hard working.
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