一台流量计准确度高，首选要重复性好，然后用高准确度的量值传递系统进行校准求得高准确度的仪表系数。
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肋骨骨折可见：（）.
A. 局部疼痛肿胀
B. 胸廓挤压试验阳性
C. 局部皮色发红、皮温增高
D. 咳嗽
E. 体温升高
Derek has created a view in the sales.nsf db. Derek wants the sales value column in the view to be punctuated to display two decimal places . which one of the following should he do?（）
A. use the @function @decimal in the column formula in the view
B. select decimal on the numbers tab in the view properties box
C. select decimal on the numbers tab in the column properties box
D. use the @function @decimal to format the value in the field on the form that will display in the view&e
易燃类液体的特点有（）。
A. 闪点在25℃以下的液体
B. 极易挥发成气体
C. 遇明火即燃烧
D. 闪点越低，越易燃烧
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