题目内容

德川幕府在1633年至1854年实行了长达200多年的锁国政策。

A. 对
B. 错

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Fill in the blanks with the information you heard. 1) Q: When will the students start their next important life stage?A: When they finish their ______(1)_______ and get their ____(2)____ .2) Q: What if the students have no idea what to do in the future?A: They don’t need to worry because they still have time to figure out_______(3)_______.

立式壳管式冷凝器属于( )冷凝器。

A. 水冷式
B. 风冷式
C. 蒸发式
D. 套管式

立式冷凝器的冷却水温升约( )℃。

A. 2-3
B. 4-6
C. 2-4
D. 3-4

卧式壳管式冷凝器的冷却水温升( )。

A. 2-3
B. 4-6
C. 2-4
D. 3-4

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