金属基复合材料的塑性成形方式主要有
A.拉拔
B.压缩
C.挤压
D.轧制
第3题
A、1.302
B、2.302
C、0.302
D、3.302
E、2.203
第7题
A、向银行借入长期借款,存入银行
B、用银行存款购买原材料
C、向国外进口设备,款项未支付
D、用银行存款归还长期借款
E、购买生产设备,款项暂未支付
第8题
有关系代数表达式:与其执行结果等价的pgSQL语句为( )。
A、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam,examinee WHERE examinee.eeid=eeexam.eeid;
B、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam CROSS JOIN examinee WHERE examinee.eeid=eeexam.eeid;
C、SELECT DISTINCT eeid,eename,eid FROM eeexam NATURAL JOIN examinee;
D、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam JOIN examinee ON examinee.eeid=eeexam.eeid;
E、SELECT DISTINCT eeid,eename,eid FROM eeexam JOIN examinee USING(eeid);
F、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam,examinee;
G、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam CROSS JOIN examinee;
H、SELECT DISTINCT eeid,eename,eid FROM eeexam NATURAL JOIN examinee WHERE examinee.eeid=eeexam.eeid;
I、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam JOIN examinee WHERE examinee.eeid=eeexam.eeid;
第10题
A、短纤维的强度、硬度高,耐磨
B、短纤维与铝基体有良好的界面结合
C、短纤维的端部易引起应力集中
D、短纤维的端部附件铝基体易产生裂纹
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