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【简答题】
根据热力学第二定律(    )． A．自然界中的一切自发过程都是不可逆的 B．不可逆过程就是不能向相反方向进行的过程 C．热量可以从高温物体传到低温物体，但不能从低温物体传到高温物体 D．任何过程总是沿着熵增加的方向进行
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举一反三
【简答题】Wi-Fi的网络安全机制有 和 两种。
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【单选题】Which of the followings is a numeric commercial book identifier?
A.
ISBN
B.
ISSN
C.
DOI
D.
IDS
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【简答题】A computer’s main memory consists of numerous memory cells, each of which contains ________ bits. Each memory cell is identified by a numeric value called the cell’s _________.
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【简答题】Which of the following systems is least efficient when encoding numeric values?A. Excess notation B. ASCII C. two's complement D. floating-point
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【单选题】Given the following requirements: Create a table to contain employee data, with a unique numeric identifier automatically assigned when a row is added, has an EDLEVEL column that permits only the valu...
A.
CREATE TABLE emp ( empno SMALLINT NEXTVAL GENERATED ALWAYS AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3) NOT NULL, edlevel CHAR(1), PRIMARY KEY emp_pk (empno), FOREIGN KEY emp_workdept_fk ON (workdept) REFERENCES department (deptno), CHECK edlevel_ck VALUES (edlevel IN ('C','H','N')), );
B.
CREATE TABLE emp ( empno SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3), edlevel CHAR(1), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY (workdept) REFERENCES department (deptno), CONSTRAINT edlevel_ck CHECK edlevel VALUES ('C','H','N') );
C.
CREATE TABLE emp ( empno SMALLINT NEXTVAL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3) NOT NULL, edlevel CHAR(1) CHECK IN ('C','H','N')), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY department (deptno) REFERENCES (workdept) );
D.
CREATE TABLE emp ( empno SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3), edlevel CHAR(1), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY (workdept) REFERENCES department (deptno), CONSTRAINT edlevel_ck CHECK (edlevel IN ('C','H','N')) );
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【单选题】Which of the followings is a numeric commercial book identifier?
A.
ISBN
B.
ISSN
C.
DOI
查看完整题目与答案
【多选题】Wi-Fi的网络安全机制有( )和( )两种。
A.
重发机制
B.
认证机制
C.
转发机制
D.
加密机制
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【单选题】汉译英：“水渍险”，正确的翻译为( )。
A.
Free from PartiCular Average
B.
All Risks
C.
Fire of Marine Average
D.
With Particular Average
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【单选题】Which of the following is the correct way of declaring variables?
A.
numeric<> Salary;
B.
Salary numeric;
C.
float 23.90;
D.
float salary
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【单选题】张女士,75岁,体型肥胖,平素不喜运动。2年前因行走后左膝关节疼痛到医院检查,诊断为“骨关节炎”1日前外出时站立不稳跌倒,头部着地,送至医院治疗。张女士目前应做的检查为
A.
头部CT检查
B.
头部X线检查
C.
心电图检查
D.
血常规检查
E.
关节X线检查
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相关题目：
【简答题】Wi-Fi的网络安全机制有 和 两种。
查看完整题目与答案
【单选题】Which of the followings is a numeric commercial book identifier?
A.
ISBN
B.
ISSN
C.
DOI
D.
IDS
查看完整题目与答案
【简答题】A computer’s main memory consists of numerous memory cells, each of which contains ________ bits. Each memory cell is identified by a numeric value called the cell’s _________.
查看完整题目与答案
【简答题】Which of the following systems is least efficient when encoding numeric values?A. Excess notation B. ASCII C. two's complement D. floating-point
查看完整题目与答案
【单选题】Given the following requirements: Create a table to contain employee data, with a unique numeric identifier automatically assigned when a row is added, has an EDLEVEL column that permits only the valu...
A.
CREATE TABLE emp ( empno SMALLINT NEXTVAL GENERATED ALWAYS AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3) NOT NULL, edlevel CHAR(1), PRIMARY KEY emp_pk (empno), FOREIGN KEY emp_workdept_fk ON (workdept) REFERENCES department (deptno), CHECK edlevel_ck VALUES (edlevel IN ('C','H','N')), );
B.
CREATE TABLE emp ( empno SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3), edlevel CHAR(1), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY (workdept) REFERENCES department (deptno), CONSTRAINT edlevel_ck CHECK edlevel VALUES ('C','H','N') );
C.
CREATE TABLE emp ( empno SMALLINT NEXTVAL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3) NOT NULL, edlevel CHAR(1) CHECK IN ('C','H','N')), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY department (deptno) REFERENCES (workdept) );
D.
CREATE TABLE emp ( empno SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3), edlevel CHAR(1), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY (workdept) REFERENCES department (deptno), CONSTRAINT edlevel_ck CHECK (edlevel IN ('C','H','N')) );
查看完整题目与答案
【单选题】Which of the followings is a numeric commercial book identifier?
A.
ISBN
B.
ISSN
C.
DOI
查看完整题目与答案
【多选题】Wi-Fi的网络安全机制有( )和( )两种。
A.
重发机制
B.
认证机制
C.
转发机制
D.
加密机制
查看完整题目与答案
【单选题】汉译英：“水渍险”，正确的翻译为( )。
A.
Free from PartiCular Average
B.
All Risks
C.
Fire of Marine Average
D.
With Particular Average
查看完整题目与答案
【单选题】Which of the following is the correct way of declaring variables?
A.
numeric<> Salary;
B.
Salary numeric;
C.
float 23.90;
D.
float salary
查看完整题目与答案
【单选题】张女士,75岁,体型肥胖,平素不喜运动。2年前因行走后左膝关节疼痛到医院检查,诊断为“骨关节炎”1日前外出时站立不稳跌倒,头部着地,送至医院治疗。张女士目前应做的检查为
A.
头部CT检查
B.
头部X线检查
C.
心电图检查
D.
血常规检查
E.
关节X线检查
查看完整题目与答案