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【单选题】
由TTL门组成的电路如下图所示，已知它们的输入短路电流【图片】＝1.6mA，高电平输入漏电流【图片】＝40μA。试问：当A=B=1时，G1的 电流为 ；A=0时，G1的 电流为 。【图片】A.
拉，3.2mA，灌，160 μA
B.
灌，6.4mA，拉，160 μA
C.
灌，3.2mA，拉，160 μA
D.
灌，3.2mA，拉，80 μA
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举一反三
【简答题】The sun rises in the east and sets in the west，so it seems as if the sun__________round the earth. A．were circling B．circles C．is circling D．be circling
【单选题】设q表示产品产量,p表示产品价格,公式∑p1q1-∑p0q1的经济意义是( )。
A.
反映产值变动的绝对额
B.
反映产品产量变动的绝对额
C.
反映由于产品价格变化而使产值变动的绝对额
D.
反映由于产品产量变化而使产值变动的绝对额
【单选题】Instead of ignoring or envying successful students, I made it my mission to _____ the mysterious causes of their success and greatness.
A.
investigate
B.
implement
C.
motivate
D.
accommodate
【单选题】Instead of ignoring or envying successful students, I made it my mission to _____ the mysterious causes of their success and greatness.
A.
discard
B.
investigate
C.
modify
D.
marshal
【单选题】Instead of ignoring or envying successful students, I made it my mission to ______ the mysterious causes of their success and greatness.
A.
implement
B.
investigate
C.
fluctuate
D.
restore
【单选题】Instead of ignoring or envying successful students, I made it my mission to _____ the mysterious causes of their success and greatness.
A.
conclude
B.
discover
C.
investigate
D.
Infer
【简答题】The sun rises in the east.
【单选题】The sun rises in the east and sets in the west, so it seems as if the sun______round the earth.
A.
were circling
B.
circles
C.
is circling
D.
be circling
【单选题】Instead of ignoring or envying successful students, I made it my mission to _____ the mysterious causes of their success and greatness.
A.
investigate
B.
enlighten
C.
fluctuate
D.
implement
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