下列探头中哪种是单晶片探头（）A.电子线阵探头  B.电子凸阵探头  C.机械扇扫探

染色体上存在的遗传物质就是DNA．______．

造成各地聚落景观差异的主要原因是 [ ]

A、居民人口多少

B、当地面积的大小

C、地域环境的差异

D、交通方式的不同

关于元素周期表和元素周期律的说法中正确的是

A．第ⅠA族元素的金属性一定比第ⅡA族的强

B．F^－、Na^＋、Mg^2＋、Al^3＋的离子半径依次增大

C．第ⅥA族元素的氢化物中，稳定性最强的其沸点最低

D．按照元素周期表的排布规律，非金属元素最多为23种

某酒厂生产的“天下景”牌葡萄酒，其包装正面和两侧的图形、字体、色彩均与已经在我国注册的驰名商标“万宝路”牌卷烟盒相近似，其封口上印的标识也与“万宝路”卷烟封口相近似。该厂所在地的工商行政管理局发现后，责令该厂停止销售这种葡萄酒，收缴其全部外包装，并处以罚款。关于本案的以下意见中，正确的是

A．该厂使用的是商品装潢，不构成侵犯他人商标专用权
B．葡萄酒与卷烟不是同类产品，故本案不存在侵权问题
C．“万宝路”是驰名商标，应扩大其保护范围
D．本案在“万宝路”生产厂家未提出控告的情况下，工商行政管理机关无权查处

This was one of my experiences (1) . When I was in my 30s, I was working for a large international company which had its head office in London. I was working in the (2) department.

The company had a training centre which was just outside London. Different courses were held there throughout (3) and I (4) go on one training course a year. These usually started (5) a Sunday evening and lasted six days.

Once I was (6) a week’s training course with about forty (7) sales people. I was in the bar on the Friday evening and suddenly a woman who was (8) behind the bar asked mea curious question. "I hope you don’t (9) my asking," she said, "but I’ve been (10) about it all week. Have you got a sister (11) Mary" The woman’s name was June. And she used to do various jobs at the training centre. She worked in the office, she organized all the food and drink for the centre and she worked in the bar at lunchtime and in the evening.

My answer (12) June’s question was "Yes", and June said, "I thought (13) . I met her last September when she was organizing a course here. " At that time, my sister was working for (14) company but in a different part of the country. That was (15) she came to be at the training centre.

(16) surprised me was how June guessed we were brother and sister. Three things made it even more (17) . First, she had met my sister six months before she met me. Second, they have about sixty new people every week at the training centre. So about one thousand five hundred people had (18) the centre in those six months. And (19) , my sister is married, so she doesn’t have the same family name as me.

We’re not (20) , but I guess we must look quite like each other.

5().

A．at

B．in

C．during

D．on