皮皮学，免费搜题
登录
搜题
【多选题】
下列说法正确的是
A.
有限数集必有上、下确界，且上、下确界分别恰为此集合的最大数与最小数。
B.
若数集S有最大数，则最大数必为其上确界。
C.
若数集S为有界数集，则S必有正常的上、下确界。
D.
无界数集必无正常的上、下确界。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】某投资者预通过蝶式套利进行玉米期货交易,他买入2手1月份玉米期货合约,同时卖出4手3月份玉米期货合约,再?
A.
同时买入2手5月份玉米期货合约
B.
一天后买人2手5月份玉米期货合约
C.
同时买入1手5月份玉米期货合约
D.
一天后卖出2手5月份玉米期货合约
查看完整题目与答案
【简答题】某投资者预通过蝶式套利进行玉米期货交易，他买入2手1月份玉米期货合约，同时卖出5手3月份玉米期货合约，再（ ）。
查看完整题目与答案
【单选题】The author mentions the Cyprus jugs to illustrate that
A.
it is hard for archaeologists to distinguish artifacts.
B.
there are still many artifacts to he discovered.
C.
archaeologists consider every artifact valuable.
D.
some artifacts are not practically valuable.
查看完整题目与答案
【简答题】动物对饲料的消化方式包括（          ）、（             ）和（           ）。A. 物理性消化 化学性消化 微生物消化
查看完整题目与答案
【判断题】Parole refers to the abstract linguistic system shared by all the members of a speech community.
A.
正确
B.
错误
查看完整题目与答案
【判断题】Langue refers to the abstract linguistic system shared by all the members of a speech community. Parole refers to the realization of langue in actual use.
A.
正确
B.
错误
查看完整题目与答案
【简答题】动物对饲料的消化方式有( )、( )和( )。
查看完整题目与答案
【单选题】听力原文：W: I just want to look at these jugs. I'm going to buy my mother one for her birthday. M: Those glass noses are nice. What does the woman want to do?
A.
She wants to buy her mother a birthday present.
B.
She likes to look at these beautiful jugs.
C.
She wants the man to help her with the jugs.
D.
She needs the jugs to decorate the room.
查看完整题目与答案
【单选题】某投资者预通过蝶式套利进行玉米期货交易，他买入2手1月份玉米期货合约，同时卖出5手3月份玉米期货合约，再( )。
A.
同时买入3手5月份玉米期货合约
B.
一天后买入手5月份玉米期货合约
C.
同时买入1手5月份玉米期货合约
D.
一天后卖出3手5月份玉米期货合约
查看完整题目与答案
【判断题】According to the Swiss linguist F. de Saussure,langue refers to the abstract linguistic system shared by all the members of a speech community, parole refers to the speech or oral system of language.
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】某投资者预通过蝶式套利进行玉米期货交易,他买入2手1月份玉米期货合约,同时卖出4手3月份玉米期货合约,再?
A.
同时买入2手5月份玉米期货合约
B.
一天后买人2手5月份玉米期货合约
C.
同时买入1手5月份玉米期货合约
D.
一天后卖出2手5月份玉米期货合约
查看完整题目与答案
【简答题】某投资者预通过蝶式套利进行玉米期货交易，他买入2手1月份玉米期货合约，同时卖出5手3月份玉米期货合约，再（ ）。
查看完整题目与答案
【单选题】The author mentions the Cyprus jugs to illustrate that
A.
it is hard for archaeologists to distinguish artifacts.
B.
there are still many artifacts to he discovered.
C.
archaeologists consider every artifact valuable.
D.
some artifacts are not practically valuable.
查看完整题目与答案
【简答题】动物对饲料的消化方式包括（          ）、（             ）和（           ）。A. 物理性消化 化学性消化 微生物消化
查看完整题目与答案
【判断题】Parole refers to the abstract linguistic system shared by all the members of a speech community.
A.
正确
B.
错误
查看完整题目与答案
【判断题】Langue refers to the abstract linguistic system shared by all the members of a speech community. Parole refers to the realization of langue in actual use.
A.
正确
B.
错误
查看完整题目与答案
【简答题】动物对饲料的消化方式有( )、( )和( )。
查看完整题目与答案
【单选题】听力原文：W: I just want to look at these jugs. I'm going to buy my mother one for her birthday. M: Those glass noses are nice. What does the woman want to do?
A.
She wants to buy her mother a birthday present.
B.
She likes to look at these beautiful jugs.
C.
She wants the man to help her with the jugs.
D.
She needs the jugs to decorate the room.
查看完整题目与答案
【单选题】某投资者预通过蝶式套利进行玉米期货交易，他买入2手1月份玉米期货合约，同时卖出5手3月份玉米期货合约，再( )。
A.
同时买入3手5月份玉米期货合约
B.
一天后买入手5月份玉米期货合约
C.
同时买入1手5月份玉米期货合约
D.
一天后卖出3手5月份玉米期货合约
查看完整题目与答案
【判断题】According to the Swiss linguist F. de Saussure,langue refers to the abstract linguistic system shared by all the members of a speech community, parole refers to the speech or oral system of language.
A.
正确
B.
错误
查看完整题目与答案