问题
判断题
塔机设计时一般能够保证空载的自重力矩和工作时的起重力矩平衡。
答案
参考答案：错
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塔机设计时一般能够保证空载的自重力矩和工作时的起重力矩平衡。
参考答案：错
句子搭配。
( ) 2. Who are they?
( ) 3. What's your uncle?
( ) 4. Is this your aunt?
A. There are five people in the family.
B. Yes, she is.
C. My uncle is a teacher.
D. They are my father, my mother, my uncle, my aunt and me.