问答题
发布日期:2021-11-16
所谓包装合理化,是指在包装过程中使用适当的材料和适当的技术,制成与物品相适应的容器,节约包装费用,降低包装成本,既满足包装保护商品、方便储运、有利销售的要求,又要提高包装的经济效益的包装综合管理活动。
要素,是汉语词语,拼音是yào sù,意思是构成事物的必要因素。
《解释》是安苏羽演唱的歌曲。
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病毒性脑膜炎常见证型是()。
Passage 1 The human race is using up the Earth's resources faster than ever before, according to a new report by the United Nations Population Fund. “Environmental devastation is not simply a waste of 1, it is a threat to the complex structures that 2human development,” says the report. 3 attention must be paid to find a(n) 4 between human and environmental needs, it says. The report, State of the World Population 2001, says that water supplies and agricultural lands are coming 5 such increasing pressure that, if left 6 , our planet will not be able to support us in future years. Over the past 70 years, the world’s population has tripled to 6.1 billion people, 7 water-use increasing six-fold, says the report. Already 508 million people live in 31 countries that lack water. And the problem is likely to 8 as the global population is 9 to rise to eight billion by 2025. By 2050, predicts the report, 4.2 billion people will be living in countries that cannot meet people's daily 10 needs. Unclean water and poor sanitation already kills over 12 million people every year. Food production is also 11 by environmental problems, says the report. “To 12 the future population and improve their diets, the world will have to double food production,” it says. “But since available cropland is 13 , most production will have to come from higher 14 rather than new 15 .” According to the report, global poverty cannot be 16 without 17 the environmental damage caused by these increases in consumption and population 18 . To reduce the burden on the planet, the report suggests, all efforts should be 19 to improve education and healthcare, as this would 20 reduce population growth.1. A. facilities B. resources C. reserves D. provisions2. A. support B. found C. retain D. advocate3. A. Intensive B. Intense C. Emergent D. Urgent4. A. equation B. tradeoff C. balance D. axis5. A. under B. into C. below D. beyond6. A. unnoticed B. behind C. alone D. unchecked7. A. in B. with C. by D. above8. A. aggravate B. heighten C. decline D. worsen9. A. projected B. speculated C. intended D. assessed10. A. luxurious B. utmost C. intrinsic D. basic11. A. affected B. effected C. reflected D. generated12. A. contain B. lodge C. furnish D. accommodate13. A. shrinking B. diminishing C. contracting D. waning14. A. outputs B. turnovers C. yields D. harvests15. A. cultivation B. production C. farming D. plowing16. A. lightened B. released C. elevated D. alleviated17. A. reversing B. inverting C. upsetting D. disregarding18. A. standards B. indexes C. norms D. levels19. A. tried B. taken C. done D. made20. A. in effect B. in turn C. in part D. by turns
虹吸式出水流道是利用虹吸原理工作的。流道进口连接泵的弯管出水室,出口淹没在出水池()以下,中间突起的顶部俗称“驼峰”。
在肾窦内出现无回声暗区,但不与肾盏及肾盂相通,可引起肾盂积水,考虑是()
某16位计算机中,带符号整数用补码表示,数据Cache和指令Cache分离。下表给出了指令系统中部分指令格式,其中Rs和Rd表示寄存器,mem表示存储单元地址,(X)表示寄存器X或存储单元X的内容。 该计算机采用5段流水方式执行指令,各流水段分别是取指(IF)、译码/读寄存器(ID)、执行/计算有效地址(EX)、访问存储器(M)和结果写回寄存器(WB),流水线采用“按序发射,按序完成”方式,没有采用转发技术处理数据相关,并且同一个寄存器的读和写操作不能在同一个时钟周期内进行。请回答下列问题。 (1)若int型变量x的值为-513,存放在寄存器R1中,则执行指令“SHR R1”后,R1的内容是多少?(用十六进制表示) (2)若某个时间段中,有连续的4条指令进入流水线,在其执行过程中没有发生任何阻塞,则执行这4条指令所需的时钟周期数为多少? (3)若高级语言程序中某赋值语句为x=a+b,x、a和b均为int型变量,它们的存储单元地址分别表示为[x]、[a]和[b]。该语句对应的指令序列及其在指令流水线中的执行过程如下图所示。则这4条指令执行过程中,I3的ID段和I4的IF段被阻塞的原因各是什么? (4)若高级语言程序中某赋值语句为x=2×x+a,x和a均为unsigned int类型变量,它们的存储单元地址分别表示为[x]、[a],则执行这条语句至少需要多少个时钟周期?要求模仿上图画出这条语句对应的指令序列及其在流水线中的执行过程示意图。
钢轨的发展方向是()、()和()。
肺癌放疗中,常说肺的DVH要求是V20<25%,其含义是()
Photoshop的通道种类有()。
随着海拔高度的上升,发动机的有效功率和有效转矩将()
感染性发热包括下列哪项()
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