第1题:
A. ALTER TABLE students ADD PRIMARY KEY _ id;
B. ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);
C. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;
D. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
E. ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
第2题:
某些长寿细胞中的脂褐素实质上是
A、终末溶酶体
B、初级溶酶体
C、次级溶酶体
D、自噬溶酶体
E、自噬泡
第3题:
此题为判断题(对,错)。
第4题:
初级溶酶体是由粗面内质网芽生的运输小泡和内体合并而成。
第5题:
初级溶酶体与次级溶酶体的区别在于()
第6题:
A.The primary line module is inactive for five minutes and then becomes active.
B.The primary line module is in standby mode,while the spare line module remains active.
C.The primary line module becomes active immediately and the spare line module becomes inactive.
D.The primary and spare line modules are active for five minutes,after which time the spare line module becomes inactive.
第7题:
为表TEST中ID列添加主键约束的语法是()
第8题:
primary structure of protein
第9题:
初级溶酶体
第10题:
初级溶酶体源自()