卷行天下高一周测卷英语答案

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14.C【解析】经典物理学，只能得出原子不稳定且发出连续光谱，不能解释原子的稳定性和原子光谱的分立特征，故A错误；根据玻尔的原子模型，氢原子辐射出光子后，其能量减小，从高能级跃迁到低能级，电子运动的轨迹半径减小，由g=m心，绕核运动的电子动能增大，故B错误；一种放射性元素，不管它是以单质形式存在，还是以化合物形式存在，都具有放射性，由于元素的化学性质主要取决于原子核外的最外层电子数，这就说明射线与核外电子无关，而是来自于原子核，故C正确；卢瑟福用α轰击氮原子核N,核反应方程为He十1NO十H,H为质子，故D错误。

110书面表达：One possible version:Dear Steven,It's been a long time since I got in touch with you.How are you doing?In order to spend some time withyou,I'd like to invite you to a concert.The concert will be held at 7 pm next Saturday in our city's gym.We can take a bus to the gym at the busstop in front of my school at 6 pm next Saturday.The concert will last for 2 hours.Afterwards,we can go to arestaurant near the gym for a late supper.Then we can have a walk,talking to each other.We will have to takea taxi and go home separately.I believe the concert will be fun and you'll love it.Yours,Li Hua