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Paul VI was the first pope to receive an Anglican Archbishop of Canterbury, Michael Ramsey in official audience as Head of Church, after the private audience visit of Archbishop Geoffrey Fisher to Pope John XXIII on 2 December 1960. Ramsey met Paul three times during his visit and opened the Anglican Centre in Rome to increase their mutual knowledge. He praised Paul VI[e] and his contributions in the service of unity. Paul replied that "by entering into our house, you are entering your own house, we are happy to open our door and heart to you." The two Church leaders signed a common declaration, which put an end to the disputes of the past and outlined a common agenda for the future.

How many times did Archbishop Ramsey meet with Paul VI?
Answer: three
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In February 2007, the fourth and last satellite of the BeiDou-1 system, BeiDou-1D (sometimes called BeiDou-2A, serving as a backup satellite), was sent up into space. It was reported that the satellite had suffered from a control system malfunction but was then fully restored.

What is the purpose of the BeiDou-1D satellite?
Answer: serving as a backup satellite
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A CD is read by focusing a 780 nm wavelength (near infrared) semiconductor laser housed within the CD player, through the bottom of the polycarbonate layer. The change in height between pits and lands results in a difference in the way the light is reflected. By measuring the intensity change with a photodiode, the data can be read from the disc. In order to accommodate the spiral pattern of data, the semiconductor laser is placed on a swing arm within the disc tray of any CD player. This swing arm allows the laser to read information from the centre to the edge of a disc, without having to interrupt the spinning of the disc itself.

What is used to discern the change of intensity in light on a CD?
Answer:
photodiode