Python绘图中，设置画笔为t，当需要设置画笔的粗细时，要用到以下哪个命令？ A: t.pencolor() B: t.pensize() C: t.fillcolor() D: t.speed()

Which of the following is a possible cause of the event "the high speed train is underdeveloped in the US"? A: Americans don't like the high speed train. B: Highway network is advanced. C: The geography is unsuitable for the high speed train. D: The high speed train damages environment.

Mark _____have hurried. After driving at top speed, he arrived half an hour early. A: needn’t B: wouldn’t

Which speed signals of CFM56-3 engine does AVM system need? ( ) A: N1 B: AVM system doesn’t need speed signals C: N1 and N2 D: N2

Mark _____ have hurried. After driving at top speed, he arrived half an hour early. A: needn’t B: wouldn’t C: mustn’t D: couldn’t

Jack have hurried. After driving at top speed, he arrived half an hour early. A: needn't B: wouldn't C: mustn't D: couldn't

Fartlek training method, also known as speed game training method, refers to the training method in which athletes change their（）at will for a long time A: Land drills, wheel t and traction training B: speed, content and environment C: Strength training, land drills and endurance training D: Training methods for jumping movements, speed endurance and environment

3) Jack ____ a twisted knee and couldn't play in the final game.(lay)4) You'll have to speed up-they ____ us!(gain)

High-speed trains travel at 300 kilometers an hour, which is about __________ normal trains. A: four times the speed as B: the speed four times of C: four times as the speed of D: four times the speed of

All shafts are low power output and don't need to set the __________. A: speed of the delta design B: compact robot C: piping lines D: security fence