问题
判断题
非隔离型光伏并网逆变器按拓扑结构可以分为工频和高频两类。
答案
参考答案：对
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非隔离型光伏并网逆变器按拓扑结构可以分为工频和高频两类。
参考答案：对
阅读理解
Jim is a little boy. He is only five years old. He isn't at school. He can't read or write. But his sister Kate is a student. She is thirteen. She is at school. She can read and write. She can sing and dance,
too. She is a good student. Their parents are teachers.
A. Yes, she is.
B. No, she isn't.
C. Yes, he is.
D. No, he isn't.
2. How old is Jim?
A. Five.
B. Seven.
C. Thirteen.
D. Fourteen.
3. Who is Kate?
A. Jim's friend.
B. Jim's sister.
C. Jim's brother.
D. Jim's mother.
4. Who can sing and dance?
A. Jim.
B. Kate.
C. Jim's father.
D. Jim's mother.
5. What is Jim's father?
A. A doctor.
B. A worker.
C. A teacher.
D. A driver.