【单选题】硅二极管的负极管子的外壳是( ),和发电机外壳一起成为发电机的( )。
【简答题】在实数范围内有意义,则 的取值范围是( ) A. >3 B. <3 C. ≥3 D. ≤3
【单选题】Single up forward to breast line and spring
A.
Let go the forward to breast line and spring line
B.
Let go the head line and forward spring line
C.
Let go all lines forward except breast line and spring
D.
Let go all lines forward except head line and spring
【单选题】“Single up forward to headline and spring!” means “ ()”.
A.
Unmoor all lines except the headline and forward spring.
B.
Moor all lines except the headline and forward spring.
C.
Hold on all lines except the headline and forward spring.
D.
Let go the headline and forward spring.
【单选题】若 x-3 在实数范围内有意义,则x的取值范围是( )
【单选题】3-x 在实数范围内有意义,则x的取值范围是( )
【单选题】王老太,70岁,卧床3周。近日骶尾部皮肤有破溃,护士仔细观察后认为是压疮的浅度溃疡期。支持此判断的是