为什么要对培训活动进行评估？

护士在指导育龄妇女选用适宜的避孕方式时，应说明在下列避孕方法中，失败率较高的是（）。

A.放置宫内节育器

B.按期口服短效避孕药

C.使用避孕套

D.避孕针

E.安全期避孕

如图所示，小明用200N的力．沿着高1m、长3m的斜面，将重480N的箱子推到车上，在这个过程中，小明做的功是______J，斜面的机械效率是______，小明使用斜面的目的是为了省______．（选填“力”或“功”）

Developing reliable software on time and within (1) represents a difficult endeavor for many organizations.
Usually business solutions have three main aspects:people, (2) , and technology.The main reason for failing software projects has little to do with technology and tools, and much to do with lack of process (3) . Experience has shown that introducing new technology and tools in an immature or undisciplined environment is likely to increase the chaos. CASE tools are not enough. "A fool with a tool is still a fool!"
Structured method was the first wave of the software industry. This was the beginning of transforming software development from a " (4) industry" to mass production.Software process movement if the second wave in the software industry.The process maturity movement prepares the way for the third wave of the software industry: "software industrialization". Software development will become like an assembly and manufacturing process. A critical enabling factor is a disciplined software engineering process with predictable quality, (5) and functionality.

A. college B. family C. workshop D. cottage

粘度、切力大对钻井的害处有哪些？

某饭店的酒吧在生意清淡的时段推出“买一送一”的鸡尾酒促销活动。鸡尾酒每杯原价为8元，饮料成本率是25%，则降价后销售量应超过降价前的______倍，这项推销政策才有效。

A．2
B．3
C．4
D．5