平刃剪切是指用两个剪刃相互平行的刀片对板料或卷料进行分离的过程。
The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（） one half crankshaft speed in a two-stroke cycle diesel engine。 crankshaft speed in a two-stroke cycle diesel engine。 two times crankshaft speed in a two-stroke cycle diesel engine。 one-fourth times crankshaft speed in a four-stroke cycle diesel engine。
银行卡操作换卡（不换卡号）交易成功后，卡号不变，但卡序号变化。
职业公关人员在站姿上要求两前脚自然开裂成（）。 25°。 30°。 45°。 60°。
在“全角”状态下，输入的字符和数字占据（）半角字符的位置。 1个。 2个。 4个。 8个。
A hygrometer is a device used for determining（）.
