Correct position should be: don't be too close to front seats will be moved to the steering wheel, instrument desk, to the upper edge of the seat headrest to eye contour;
正确的位置应该是:不要将前座椅移到太接近方向盘、仪表台的地方,要保证座椅头枕的上边缘与眼睛等高;
Using moderate resolution capabilities of a desk time-of-flight (TOF) instrument, the fragmentation regularity from electron impact mass spectra of vitexin was studied.
利用台式飞行时间质谱的中分辨本领,研究了牡荆素的电子轰击质谱的裂解规律,对裂解途径进行了完全的指认。
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