诊断急性胆囊炎,有意义的体征是()。
A.麦氏点有无压痛
B.Murphy征是否阳性
C.季肋点有无压痛
D.肠鸣音是否改变
E.有无反跳痛
参考答案:B
We should consider the students’ request _____ the school library provide more books on popular science.
A.that
B.when
C.which
D.what
结合本人所在岗位,以某一检测项目为例,简要试述室内质控步骤。