题目内容

A modern school has sprung up in ____ was a fishing pond 10 years ago.

A. which
B. what
C. that
D. where

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Exciting news: You have a date coming up. It may be with someone you've had your eye on for a long time, or just someone who has piqued (激起，引起) your interest. 1 , having a good time doesn't have to correlate to spending a lot of money. Check out these five cheap college date ideas for a fun time that won't 2 the bank.

冲压主要以金属材料为主，普遍是在常温下利用金属的（），在冲压设备上通过冲压模具冲压成形各种不同形状的制件。

压力机按工作原理分为（）、（）和（）3种。

曲柄作匀速转动，但滑块在其行程中各点的运动速度是不相同的。滑块在上正点（α=180°）和下止点（α=0°）时，其运动速度为（）；而滑块在行程中点（α=75°~ 90°和α=270°～285°）时，其运动速度为最大，近似取α=（）°和α=（）°时的滑块速度作为滑块的最大速度。