1:8的光分器,光功率损耗不大于(),1:16的光分器,光功率损耗不大于()。
A.10.7
B.13.9
C.17.2
D.7.4
参考答案:A, B
-6与4这两个数和的倒数列式为( ),-6与4的倒数和列式为( )。
Mike and his father are sitting at the table(正坐在桌边)。They are having their lunch. “ I don‘t like this soup (汤). I don‘t want to have it” , says Mike . After lunch , Mike and his father work on the farm . They work hard. In the evening , Mike’s father gives him a bowl of soup . “Oh, this soup is nice “, says Mike. His mother says: “It’s the same soup.”
小题1:Who doesn’t like the soup for lunch ?.
A.His mother
B.His mother
C.Mike
D.A and B小题2:After lunch , they work _______.
A.in the factory
B.in the school
C.on the farm
D.in the hospital小题3:In the evening , Mike’s father gives him _____
A.a bowl of rice
B.a piece of meat
C.a bowl of soup
D.a glass of mike小题4:Does Mike like the soup in the evening ?
A.Yes, very much.
B.No, he doesn’t
C.Yes, a little.
D.He doesn’t like it at all.小题5:Mike’s father is a ______.
A.farmer.
B.worker
C.teacher
D.doctor