在红外光谱中，C=C的伸缩振动吸收峰出现的波数范围是（ ） A: 1680~1620 B: 2400~2100 C: 1600~1500 D: 1000~650

在红外光谱中，C=C的伸缩振动吸收峰出现的波数范围是（ ） A: 2400 ~ 2100 [img=41x22]18031020380ba37.png[/img] B: 1680 ~ 1620 [img=41x22]18031020380ba37.png[/img] C: 1600 ~ 1500 [img=41x22]18031020380ba37.png[/img] D: 1000 ~ 650 [img=41x22]18031020380ba37.png[/img]

In 1620 the transported Pilgrims to the New World.

MatePadPro的屏幕分辨率是？（） A: 2560*1600 B: 2560*1680 C: 2580*1600 D: 2580*1680

《民法典》分为多少编，共多少个条文？ A: 7编 1260 B: 6编 1620 C: 7编 1620

力法方程中的自由项Δ1P为() A: 1620/EI B: -1620/EI C: 1164/EI D: -1164/EI

In _____, a small group of Puritans sailed from _____ in the Mayflower to be the first settlers in the North America. A: 1620, London B: 1620, Plymouth C: 1720, London D: 1720, Plymouth

In 1620, the Pilgrim Fathers sailed for Virginia on a ship called __________.

Between _____, a distinctly American society emerged. It was a society that differed significantly fromBritain. A: 1680 and 1776 B: 1682 and 1772 C: 1680 and 1767 D: 1676 and 1776

. In 1620 some English Puritans sailed to Plymouth on a ship called ____