沉淀蛋白质的方法有很多种，比如中性盐沉淀反应、（）、加热沉淀反应、生物碱沉淀反应等。
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从（）的角度，治安管理学和治安学一样可以分为理论治安管理学和应用治安管理学两大部分。
承受弯矩，用弹簧钢板制成，主要用于汽车、拖拉机和机车车辆的缓冲减振的弹簧是（）弹簧。
A. 盘弹簧
B. 板弹簧
C. 压缩弹簧
根据《中国邮政储蓄银行理财类业务指引》，客户办理国债业务时若申请额度为100000，则在操作界面申请额度金额处应输入的金额是（）。
A. 1
B. 10
C. 100
D. 1000
You are ordering ships’ stores that are NOT consumer commodities. Which statement is TRUE?（）
All flammable liquids must be stowed in the paint locker or specially constructed integral tanks
B. The label of a hazardous ships' store must include instructions for safe stowage
C. Replacement CO2 cylinders for the fixed fire fighting system must have been tested within 8 years of receipt
D. Cartridges for the line throwing appliance must be stored in the portable magazine chest after receipt
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