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【单选题】
在一项抽样研究中,当样本量逐渐增大时
A.
标准差逐渐减少
B.
标准误逐渐减少
C.
标准差逐渐增大
D.
标准误逐渐增大
E.
标准差和标准误都逐渐增大
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【简答题】边际替代率的概念及边际替代率递减规律。
【多选题】Catalytic hydroprocessing can _________.
A.
remove non-hydrocarbon impurities such as sulphur, nitrogen and metal in order to give acceptable quality for finished products
B.
ncrease the octane number of light crude fractions having high paraffin and naphthene contents by converting them to aromatics
C.
distill crude oil into fractions
D.
convert heavy, low-value oils into lighter, high-value products
【单选题】磷化锌中毒的病人在饮食上需很注意,牛奶、鸡蛋及其他油类食物都不能食用,这是因为
A.
分解成毒性更强的物质
B.
分解成更易吸收的物质
C.
促进磷的溶解吸收
D.
促进锌的溶解吸收
【单选题】因为你在这个群体中的身份地位,而与他人建立的关系称之为_________。
A.
社会关系
B.
家庭关系
C.
权利关系
D.
人际关系
【单选题】RIP 使用什么做为度量 标 准,管理距离是多 少
A.
带宽 , 1 10
B.
跳数 , 1 20
C.
跳数 , 1
D.
延迟 , 1 10
【多选题】Catalytic hydroprocessing can _________.
A.
remove non-hydrocarbon impurities such as sulphur, nitrogen and metal in order to give acceptable quality for finished products
B.
increase the octane number of light crude fractions having high paraffin and naphthene contents by converting them to aromatics
C.
distill crude oil into fractions
D.
convert heavy, low-value oils into lighter, high-value products
【判断题】巴氏杀菌乳要求杀死全部导致产品变质的微生物。
A.
正确
B.
错误
【多选题】In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer (OSI Layer 2), such as Ethernet M...
A.
The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application
B.
The last 3 bytes (24 bits) of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application
C.
To calculate the Layer 2 multicast address, the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0
D.
The first 3 bytes (24 bits) of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application
【单选题】磷化锌中毒的病人在饮食上需很注意,牛奶、鸡蛋及其他油类食物都不能食用,这是因为
A.
分解成毒性更强的物质
B.
分解成更易吸收的物质
C.
促进磷的溶解吸收
D.
促进锌的溶解吸收
E.
与蛋白结合后不易排出
【判断题】Sometimes the Chinese way of showing modesty may be considered as fishing for compliment.
A.
正确
B.
错误
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