试题详情

Reading in bed or in the sun does ________ to our eyes.

Its ______ for your eyes to read in bed.

s in the room, the rule about the right to sit is always the same. The best way both for reading a

light is in the room, the rule about the right to sit is always the same. Which of the following

nd the stream of plasma coming from the Sun is called the solar wind. The more active the Sun,the st