可造成连续假阳性的因素有:()
A.洗涤不充分
B.试剂污染
C.加多.加少了试剂或样本
D.样本质量问题
参考答案:A, B, C, D
—Excuse me. Do you know ______ the theater?
—There’s one next to the library.
A.how can I get to
B.how I can get to
C.how can I get
D.how I can get
按下哪个键,可以绘制0度、45度、90度、135度的直线()
A.Alt
B.Shift
C.Ctrl
D.Shift+Alt