局麻出现并发症注射区水肿时常见的原因是()
A.药物变质
B.药液不等渗
C.注射针头有倒钩
D.注射针造成骨膜撕裂
E.药液有杂质
参考答案:A, B, C, D, E
精神疾病的共同特点是()
A.幻觉
B.妄想
C.人格障碍
D.无自知力
E.心理活动异常
If n is an integer between 2 and 100 and if n is also the square of an integer, what is the value of n ?() (1)n is the cube of an integer. (2)n is even.
A.条件(1)充分,但条件(2)不充分.
B.条件(2)充分,但条件(1)不充分.
C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D.条件(1)充分,条件(2)也充分.
E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.