用所给词的适当形式填空。
I have many pen pals in many 1_____ (country). Do you know the girl on the bike in the photo?
She is one of my pen 2_____ (pal). Her name is Reiko. She is a Japanese student. We have the same
age 13 years old. She 3_____ (live) in Tokyo. She 4_____ (have) two brothers. They live with their
parents.
I like Reiko very much. But I don't know 5_____ (Japan), and Reiko 6_____ (not know) Chinese.
But we know English. So we 7_____ (write) letters in English. Sometimes we talk on the phone. My
favorite subject is math. 8_____ (she) favorite subject is music. We have the same 9_____ (hobby).
We like seeing comedies, playing volleyball and 10_____ (eat) hamburgers.
sin100πtV的交流电源，副线圈接一个R=27.5Ω的负载电阻．则下述结论正确的是（ ）
W