在平面直角坐标系中，有三点A（﹣1，﹣1），P（0，﹣1），Q（﹣2，0），若以点A为圆心、OA长为半径作圆，试判断点P、Q与⊙A的位置关系．

根据短文理解，选择正确答案。

    With a floor area（占地面积）larger than Beijing' Tian'anmen Square, the Guangdong Science Centre is known as the world's largest science and technology museum. The centre is located on Xiaoguwei（小谷围岛）Island and seen from a distance, it looks like a kapok flower（木棉花）of Guangzhou. It is one of the most famous “landmarks of Guangzhou”.

    It cost the government about 1.9 billion yuan to build the centre over five years. On September 27, 2008, it was opened to the public. The centre shows China's newest fruits of science and technology. It is full of exciting small machines and amazing small invention, waiting to help you understand interesting aspects（方面）of the world of science.

    The centre offers eight exhibition areas, four science cinemas, two open labs and a digital “family experience” hall. Outside the main building, there is an 80,000-square-metre man-made lake for water-theme exhibitions and outdoor science square.

    Exhibition: Children's World, Experience and Discovery, Transportation World, Digital World,  Green Home, Flight Dream, The Human Body and health, Perception and Thinking

    Opening hours: 9:30 am to 4:30 pm from Tuesday to Sunday; Closed on Monday (except public holidays and Golden Weeks)

    Ordinary ticket: 60 yuan/person

下列说法正确的是（　　）

（2015·四川）将苏云金杆菌Bt蛋白的基因导入棉花细胞中，可获得抗棉铃虫的转基因棉，其过程如下图所示（注：农杆菌中Ti质拉上只有T－DNA片段能转移到植物细胞中）。