Lead time的定义？

[主观题]H．omework_____ontimewillleadtobettergrades.(A)done(B)bedone(C)havingdone(D)tohavebeendone

[主观题]Homework_____ontimewillleadtobettergrades.(A)done(B)bedone(C)havingdone(D)tohavebeendone

[名词解释] 英译中：Lead time

[主观题]解释setup time和hold time的定义和在时钟信号延迟时的变化。（未知）

[单选题]Stressful environments lead to unhealthy behaviors such as poor eating habits, which ________ increase the risk of heart disease.[A] in turn[B] in return[C] by chance[D] by turns

[名词解释] 引入线 lead line

[单选题]Adjust （） by means of lead wire.A . the clearance of the main bearingB . the diameter of main bearingC . the gap of main beatingD . the tolerance of main bearing

[单选题]Measure （） by means of lead wire.A . the clearance of the main bearingB . the play of the miler bearingC . the gap of the main bearingD . the tolerance of the main bearing

[单选题]It is important to use only pure lead and to choose a thickness of wire which is greater than the normal allowable clearance but （） this amount.A . not less than twiceB . greater at least twice thanC . not greater twice thanD . larger three times tha

[名词解释] 客运导向设备 lead facility