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【单选题】
差动变压器产生零点残余电压的原因,不包括( )
A.
线圈参数的不对称
B.
导磁体的安装
C.
激励电压的高低
D.
传感器具有铁损
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参考答案:
举一反三
【简答题】脱式计算(能简算的要简算) (8)83小5+450÷88×w5 (w) w 5 + 3 5 × 4 2 ÷ 4 5 (3)2.08×808 (4)8.w8×4w-(4.4m+0.84) (5) 4 小 × 8 5 + 4 小 ÷5 (m) 8 3 ×( 8 w -50× 8 800 ) .
【简答题】坡度不大于1/10且小于1/2的屋面,_______、_______、_______、_______应为其易受雷击的部位。
【判断题】右手法则又称为电动机定则,左手定则又称为发电机定则。
A.
正确
B.
错误
【单选题】Read the message from Sleepless in Seoul . What is the writer's problem? a. The writer is unhappy about his/her grade. ( ) b. The writer is worried about a test. ( ) c. The writer failed...
A.
The writer is unhappy about his/her grade.
B.
b. The writer is worried about a test.
C.
The writer failed an exam last Friday.
【单选题】室内LED发光器件ρ15mm显示屏256色最大功耗为( )。
A.
450W/m2
B.
750W/m2
C.
900W/m2
D.
1000W/m2
【单选题】单坡跨度大于( )的平屋面宜做结构找坡且( )。
A.
6m,坡度不小于1%
B.
7m,坡度不小于2%
C.
8m,坡度不小于4%
D.
9m,坡度不小于3%
【单选题】根据当地的气候土壤条件,确定绿化树种后,选择适合的绿地进行栽植,此途径为(   )。
A.
选地适树
B.
选树适地
C.
改地适树
D.
改树适地
【单选题】CT检查肺窗宽窗的窗宽和窗位分别是
A.
W1500~2000Hu.C-600~-450Hu
B.
W1350~1500Hu.C-500~-350Hu
C.
W1350~1500Hu.C-800~-600Hu
D.
W600~800Hu.C-600Hu
E.
W350~500Hu,C35~50Hu
【简答题】One morning, Jim Reed checked his e-mail. He found a strange message on the e-mail. It was from a woman in Pittsburgh, Pennsylvania. He had talked to her on e-mail many times in the last ten days. All...
【简答题】One morning, JimReed checked his e-mail. He found a strange message on the e-mail. It was froma woman in Pittsburgh, Pennsylvania. He had talked to her on e-mail many timesin the last ten days. All th...
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