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阅读理解

1、单选题：
Passage 1 Wal-Marts Distribution System‎Owning more than 20 DCs, Wal-Mart now provides service to over 2,500 retail outlets in 18 states across the States respectively.‎Although a lot of large chain stores outsource all their shipment tasks to specialist freight‎forwarders hoping to reduce costs. Wal-Mart has long persisted in having its own fleet and drivers with the purpose to maintain flexibility and optimal service.‎Wal-Mart makes its replenishment operation more accurate, efficient and has reduced costs greatly with its automated replenishment system which has adopted the technologies of bar code‎(UPC-Universal Product Code), RFDC(radio frequency data communication ) and computerized‎automatic analysis.‎It owns a fleet of over 20 million tractors, more than 3,700 drivers, with an annual shipment of 77,000 vehicles/times and an accident-free record in 3 million kilometers of journey. The fleet adopts computerized schedule and uses GPS systems to position and trace the vehicles.‎Wal-Marts outlets order goods via computer to their headquarters, averaging two days for replenishment, and in emergent cases, goods can arrive the second day. While its competitors cannot in time make replenishment, Wal-Mart keeps sufficient goods on the shelf, thus winning the cutting edge.‎Wal-Mart’s fleet also adopts a range of scientific and reasonable shipment tactics, such as full load shipment, loading of bulk goods, nighttime delivery, etc. Meanwhile it instructs the suppliers to stock up goods as per the order requirements and make JIT delivery by appointment.‎In so doing the operation costs of both Wal-mart and suppliers are reduced‎ ‎Ouestions:‎1. Why does Wal-Mart insist on operating shipment tasks by itself?‎
选项：
A: Reducing cost and getting better service.
B: Keeping flexibility and optimization service.
C: Reducing cost and keeping flexibility.
D:  Keeping efficiency and optimization service.
答案: 【 Keeping flexibility and optimization service.】点我阅读全文

第1次 单元测试

1、单选题：
‍正常情况下，胎儿期是指从受精卵到胎儿出生约​
选项：
A: 39周
B: 38周
C: 42周
D: 40周
答案: 【 40周】点我阅读全文

第二章 电力电子器件单元测试

1、单选题：
‌晶闸管型号为KP30－12中，数字12表示（    ）。‍
选项：
A: 额定电压12V 
B: 额定电流12A   
C: 额定电压1200V  
D: 额定电流1200A
答案: 【 额定电压1200V  】点我阅读全文

第一讲 人工智能概述单元测试

1、单选题：
​人工智能中通常把（             ）作为衡量机器智能的准则。‎
选项：
A: 图灵机
B: 图灵测试
C: 中文屋思想实验
D: 人类智能
答案: 【 图灵测试】点我阅读全文

第1讲模拟练习题

1、单选题：
‏关于数据库系统和数据库管理系统，下列说法正确的是__________。​
选项：
A: 数据库系统和数据库管理系统指的是同一软件产品
B: 数据库系统和数据库管理系统指的是不同软件产品
C: 数据库管理系统是软件产品，而数据库系统不仅仅是软件产品
D: 数据库系统是软件产品，而数据库管理系统不仅仅是软件产品
答案: 【 数据库管理系统是软件产品，而数据库系统不仅仅是软件产品】点我阅读全文

1.1 随堂练习

1、多选题：
‍门式刚架结构一般采用的材料是_________.‏
选项：
A: Q235钢
B: Q175钢
C: Q490钢
D: Q345钢
答案: 【 Q235钢;
Q345钢】点我阅读全文

二阶常系数非齐次线性方程的解随堂测验

1、单选题：

1.设线性无关的函数都是二阶常系数非齐次线性微分方程的特解，是任意常数，则该非齐次方程的通解是（    ）

‌

A.

‌

B.

‌

C.

‌

D.

‌

‏

‌选项：
A:
B:
C:
D:
答案: 【 】点我阅读全文

测试一创业与创业者

1、单选题：
​一种稀缺的资源禀赋，一般自然人普遍缺乏的素质，而创业者独有的特质是（）​
选项：
A: 风险承担
B: 创新
C: 高成就导向
D: 独立
答案: 【 风险承担】点我阅读全文

单元测验

1、单选题：
‌早在20世纪70年代人们就已发现，高达（     ）的疾病或死亡因素与“行为及不健康的生活方式”有关？‍
选项：
A: 50%‍
B: 50%
C: 30.58%‍
D: 45%
E: 25%
F: 15%
答案: 【 50%‍;
50%】点我阅读全文

测试

1、单选题：

‍1.计算极限的结果是

​选项：
A: 不存在
B:
C:
D: 0
答案: 【 不存在】点我阅读全文