【单选题】单作用电磁控制的图形符号(GB876.1-93)是______。(见丙类大管轮船舶201712文档插图6)
【判断题】棘轮机构中棘爪常是主动件,棘轮是从动件。
【判断题】棘轮机构中,棘爪是主动件,棘轮是从动件。 ( )
【单选题】Oberon says in Act III Scene 2 that "About the woods go swifter than the wind,/ and Helena of Athens look thou find." If we read these two lines closely, we may rearrange the sentence order of these t...
A.
You should go swifter than the wind around the forest, and make sure you find Helena of Athens.
B.
I should go swifter than the wind around the forest, and make sure I find helena of Athens.
C.
Helena of Athens should go swifter around the forest than the wind, and she looks to find you.
D.
Nobody goes swifter than the wind in the forest, and you should make sure to find her.
【多选题】关于手工铺砂法测路面构造深度,以下说法正确的是( )。
A.
用扫帚或毛刷子将测点附近的路面清扫干净,面积不小于30mm×30mm。
B.
用小铲装砂,沿筒壁向圆筒中注满砂,手提圆筒上方,在硬质路表面上轻轻地叩打3次,使砂密实;补足砂面用钢尺一次刮平。
C.
将砂倒在路面上,用底面粘有橡胶片的推平板,由里向外重复作旋转摊铺运动,稍稍用力将砂细心地尽可能地向外摊开,使砂填入凹凸不平的路表面的空隙中,尽可能将砂摊成圆形,并不得在表面上留有浮动余砂。
D.
用钢板尺测量所构成圆的两个垂直方向的直径,取其平均值,准确至1mm。也可用专用尺直接测量构造深度。
【判断题】万用表是用来测量交直流电压、电阻、直流电流等的仪表。是电工和无线电制作的必备工具。
【单选题】注射剂中加入抗氧剂有许多,下列选项中不属于抗氧剂的是
【多选题】关于手工铺砂法,下列说法正确的是( )。
C.
同一处平行测定不小于3次,3个测点均位于轮迹带上,测点间距3~5m。