【单选题】将药物加水反复煎煮,去渣浓缩后,加蜜或糖炼制而成的半液体剂型属
【判断题】理论轮廓曲线相同而实际轮廓曲线不同的两个对心直动滚子从动件盘形凸轮机构,其从动件的运动规律是不一样的。
【多选题】目前,下列变压器属于节能型变压器的有( )
【判断题】土壤中的钙、镁比为3-5:1时,对茶树生长最为有利,低于这一比值茶树就会缺镁。
【单选题】路路通除具有祛风通络,利水消肿的功效外,尚能
【单选题】Which of the following does NOT correctly describe a perpetual inventory system?
A.
Cost of goods sold is calculated every time a sale is made.
B.
Assuming shrinkage of zero, inventory and cost of goods sold do not have to be updated at the end of the period.
C.
The use of this system eliminates the requirement for an annual physical inventory count.
D.
Assuming a FIFO cost flow, cost of goods sold would equal that calculated by the periodic system.
【判断题】含有一个储能元件的系统用惯性环节表示,输出不能立即复现输入,快速性和时间常数大小有关系,阶跃响应有可能振荡。
【单选题】某女士, 25 岁,结婚 2 年未避孕,未孕。病人平素月经周期 20 天,经期 4~5 天,该病人可能患有