若压力为F，横截面积为S时，压强为P，那么（  ）

巴西是南美洲面积最大、人口最多、经济最发达的国家，属于新兴经济体“金砖五国”之一．读图完成下题．

①橘皮在石灰水中浸泡时间为10小时以上　②橘皮要浸透，压榨时才不会滑脱

③压榨液的黏稠度要高，从而提高出油率  ④压榨时加入0.25%的小苏打和5%的硫酸钠．

⑴Dad，where are my keys? ____         A．No，thanks．

⑵What's in your schoolbag?____         B．He's a doctor．

⑶Would you like a knife and fork?____   C．They are in the door．

⑷What's your father's job?____          D．Yes，they are．

⑸Who is she?____                      E．Two pencils and many books．

⑹Are they on the table?____            F．She's my aunt．