[说明] 设有三个关系： BOOK (BNO，BNAME，PUBLISH_YE

I spent most of my summer holidays travel in London. I arrived there in middle of July. After reaching my sister’s apartment I got many sleep. The next day I went to St Paul’s Cathedral, an amazing monument, that was well worth a visit. After take some photos in front of it, I moved on to the Tate Modern art gallery. There is an excellent exhibition of oil paintings and sculptures by some famous British artist. For dinner we went to the Ivy, a very beautifully restaurant. The food was good but the atmosphere was nice. It was a great day of sightseeing and one that would never be forgotten it.

通常用的手电筒的小灯泡，正常发光时的电流为0.3A，这时小灯泡的功率最接近（　　）

A．1W

B．10W

C．100W

D．1000W

关于债权人的代位权，下列表述正确的是( )。

A．债务人怠于行使其到期债权，对债权人造成损害的，债权人才有权行使代位权

B．债权人可以请求人民法院以自己名义代位行使债务人的债权，也可以径直行使

C．债权人行使代位权时，行使范围不以单个债权人的债权为限

D．债权人行使代位权时的必要费用，应当由债权人与债务人平均分担

新年伊始，我国中东部各地陆续出现大范围和长时间雾霾天气。自觉减少空气污染，人人有责。有人提出，让我们从乘公交、地铁上班做起，从少开一小时空调做起，从少抽一支烟做起。这一提法是因为（）。

①人生机遇是实现人生价值的关键

②人们价值选择以价值判断为基础

③社会发展取决于人们的价值选择

④社会发展离不开个人的积极努力

A、①③

B、②③

C、②④

D、③④

革兰氏染色法从细胞壁的角度来讲，在经过草酸铵结晶紫染色和碘-碘化钾溶液媒染后，用中性脱色剂（如乙醇或丙酮）脱色时为什么革兰氏阳性菌不被褪色而呈紫色革兰氏阴性菌被褪色而呈无色？