患者,男性,40岁。一月前诊断为急性心包炎,近两周呼吸困难严重,心率加快。查体发现患者有颈静脉怒张、奇脉,心浊音界向两侧增大,皆为绝对浊音区,左肩胛骨下叩诊浊音并闻及支气管呼吸音。医生考虑本患者出现大量心包积液。诊断心包积液迅速、可靠的方法是().
A. 心电图
B. 心包镜
C. 心包穿刺
D. X线检查
E. 超声心动图
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UE采用基于下行覆盖的切换方式,从3G切换到2G,切换失败后,回滚到3G网络。这样的问题就可能是存在了越区覆盖情况,在设置2/3G切换参数时,有一个参数BSIC验证开关,打开后表示UE将使用“频点+NCC+BCC”来确定2G小区,那么根据协议规定,BSIC配置多少代表打开了BSIC校验。()
A. 0
B. 1
C. 2
D. 3
近代史学家蒋廷黻指出,“关于鸦片问题,我方力图禁绝,英方则希望维持原状:我攻彼守。关于通商问题,英方力图获得更大的机会和自由,我方则硬要维持原状:彼攻我守。就世界大势论,那次的战争是不能避免的。”这场“不能避免的”战争给中国带来的最大影响是()
A. 中国自然经济开始解体
B. 中国社会矛盾发生根本变化
C. 中国社会性质发生剧变
D. 中国革命进入民主革命阶段
()气瓶:以金属材料为内层筒体(亦称瓶胆)其外侧缠绕高强纤维并以塑料固化作为加强层的复合气瓶。
A. 玻璃钢
B. 钢制焊接
C. 复合气瓶
Examine the structure if the EMPLOYEES table: Column name Data Type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) NOT NULL SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the DEPARTMENTS table You need to create a view called EMP_VU that allows the user to insert rows through the view. Which SQL statement, when used to create the EMP_VU view, allows the user to insert rows? ()
A. CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, department_id FROM employees WHERE mgr_id IN (102, 120);
B. CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, job_id department_id FROM employees WHERE mgr_id IN (102, 120);
CREATE VIEW emp_Vu AS SELECT department_id, SUM(sal) TOTALSAL FROM employees WHERE mgr_id IN (102, 120) GROUP BY department_ id;
D. CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, job_id, DISTINCT department_id FROM employee