皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【单选题】
下列化合物中即能发生亲电取代反应,又能进行亲核取代反应的是( )
A.
选项A
B.
选项B
C.
选项C
D.
选项D
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【判断题】丙磺舒促进尿酸排泄
A.
正确
B.
错误
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】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
【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。你认为张女士跌倒的原因为
A.
生理因素
B.
病理因素
C.
药物因素
D.
心理因素
E.
环境因素
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
【判断题】社会主义改造最大意义在于使得中国真正步入了社会主义社会。
A.
正确
B.
错误
查看完整题目与答案
【单选题】(17 ~19 题共用病例) 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。 17.你认为张女士跌倒的原因为
A.
生理因素
B.
病理因素
C.
药物因素
D.
心理因素
E.
环境因素
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
相关题目：
【判断题】丙磺舒促进尿酸排泄
A.
正确
B.
错误
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】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
【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。你认为张女士跌倒的原因为
A.
生理因素
B.
病理因素
C.
药物因素
D.
心理因素
E.
环境因素
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
【判断题】社会主义改造最大意义在于使得中国真正步入了社会主义社会。
A.
正确
B.
错误
查看完整题目与答案
【单选题】(17 ~19 题共用病例) 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。 17.你认为张女士跌倒的原因为
A.
生理因素
B.
病理因素
C.
药物因素
D.
心理因素
E.
环境因素
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
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题