In paragraph 3, what is the authors position in regard to cell phone use restriction?
A neutral stance.
B. Firm support for restriction.
C. Opposition to any restriction.
D. Ambivalence.
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只要点火开关接通,EFI系统汽油泵一定在泵油。()
制动过程中当车轮出现抱死,在地面产生拖印时,即能产生最大制动力。()
装有ABS系统的汽车,在制动后期,会有车轮被抱死,地面留有拖印的现象。()
启动机换向器的作用是使直流电动机维持定向旋转。()