在装配尺寸链中，封闭环是在装配过程中最后形成的一环，也即为装配的精度要求。
查看答案
尺寸链增环增大，封闭环增大；减环减小，封闭环减小。
A. 对
B. 错
He is very . He often his school things at home.
A. careful; leaves
B. careless; forget
C. careful; forgets
D. careless; leaves
It’s windy outside.______ your jacket, Bob.
A. Try on
B. Put on
C. Take off
D. Wear
She’s ______ with her present ______ job.
A. boring, boring
B. bored, bored
C. boring, bored
D. bored, boring
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