特异性高，但与SLE活动性无关的是（）
A.抗核抗体
B.抗Sm抗体
C.抗双链DNA抗体
D.抗磷脂抗体
E.类风湿因子
参考答案：B
— Mom, the door ____. My keys are locked in it again.
— You ____ it! I told you always to carry your keys with you. [ ]
A. can’t open; have asked for
B. wouldn’t be opened; asked for
C. won’t open; asked for
D. can’t be opened; are asking for
展绘控制点时，应在图上标明控制点的（）。
A、点号
B、高程
C、坐标与高程
D、高程与方向
