【多选题】Which four statements about an IP service level agreement (SLA) are true? ()
A.
SLA responder knows type of operation, the port used, and duration.
B.
SLA responder inserts in and out timestamps in the packet payload.
C.
SLA sender and responder use the IP SLA Control Protocol to communicate with each other before
D.
SLA sender and responder communication can be encrypted.
E.
SLA sender and responder communication can be authenticated with MD5.
【单选题】A healthy diet with proper nutrition is essential for maintaining good overall health. Since the discovery of vitamins earlier in this century, people have routinely been taking vitamin supplements fo...
A.
The RDA approach should be replaced by a more realistic nutritional guide.
B.
The RDA approach should be supplemented with more specific nutritional guides.
C.
In spite of its flaws,the RDA approach is definitely the best guide to good nutrition.
D.
The RDA approach is most suitable for a large family.
【单选题】下列关于物流说法正确的是()。
A.
物流所要“流”的对象是一切物品,包括有形物品和无形物品
B.
只有物品物理位置发生变化的活动,如运输、搬运、装卸等活动才属于物流活动
C.
物流不仅仅研究物的流通和储存,还研究伴随物的流通和储存而产生的信息处理
D.
物流只是指从制造企业原材料的供应、储存、搬运、加工、生产直至产成品的销售整个过程
【多选题】关于物流说法正确的有()。
A.
“PhysicalDistribution”比“Logistics”所表示的物流外延更广泛
B.
物流通过运输和存储分别解决对货物空间和时间变化上的要求
C.
对于物流国内外没有统一概念,但大体意思是基本相同
D.
物流就是运输、仓储、包装、装卸搬运、流通加工
【单选题】“纳米材料”是粒子直径为1~100nm(纳米)的材料,纳米碳就是其中的一种.若将纳米碳均匀地分散到某分散剂中形成均一较稳定的体系,所形成的物质( ) ①是溶液 ②是胶体 ③能产生丁达尔效应 ④能透过滤纸 ⑤不能透过滤纸 ⑥静置后,会析出黑色沉淀.
【单选题】Zunyi Conference on January 15, 1935 was an important meeting in the history of the Communist Party of China, which established the correct leadership of the new CPC Central Committee with ______ as i...
【多选题】关于物流的说法正确的有()
C.
物流的发展依次经历了传统物流、现代物流和综合物流三个阶段
D.
现代物流的标志是物流活动领域中各环节的技术水平得到了不断提高
【单选题】Which of the following is NOT true of John Waihee?
A.
He suggested that the native people decide for themselves.
B.
He is leading the local independence movement.
C.
He is Hawaii's first native governor.
D.
He has set up a sovereignty advisory committee.
【单选题】下列有关“规定”正确的是
B.
空气中直径大于2.5μm的颗粒物称为PM2.5
C.
分散质粒子直径介于1nm~100nm之间的分散系称为胶体
【单选题】Which of the following is NOT tree of John Waihee?
A.
He suggested that the native people decide sovereignty for themselves.
B.
He is leading the local independence movement.
C.
He is Hawaii's first native governor.
D.
He has set up a sovereignty advisory committee.