诊断AMI的金标准是()
A.AST
B.CK-MB
C.LDH
D.CK
E.ChE
参考答案:B
用恰当的介词填空。
1. —Where is the school?
—It's ______ Sixth Avenue.
2. The nearest (最近的) hotel is ______ the bank and the bus station (公交车站).
3. Our school is next ______ the library.
4. The bank is across ______ the police office (警察局).
5. There is a tree ______ front of my house.
两个重叠在一起的滑块,置于固定的、倾角为θ的斜面上,如图所示,滑块A、B的质量分别为m1、m2,A与与斜面间的动摩擦因数为μ1,B与A之间的动摩擦因数为μ2,已知两滑块一起从静止开始以相同的加速度从斜面滑下,滑块B受到的摩擦力为()
A、等于零
B、大小等于
C、大小等于
D、方向沿斜面向上