以下不属于三角高程测量野外观测数据的一项是（ ）。
A. 竖直角测量
B. 距离测量
C. 仪器高测量
D. 水平角度测量
查看答案
由于高差原因，在采用三角高程测量方法的时候测得两点之间的水平距离为200.680米，测得两点之间的竖直角（仰角）为4°30′00″。若已知低点的高程为96.350米，测量时量的仪器为1.350米，目标高1.476米。则高点的高程为（）米。
A. 111.969
B. 112.095
C. 112.018
D. 112.144
Which of the following cell to cell interactions are not MHC restricted?
A. CTL and target cells
B. Th2 and B cells
C. T cell and DC
D. NK and target cells
E. Th1 and macrophage
Which of the following statements is correct about the killing of target cells by CTLs?
A. CTLs don’t need to contact target cells.
B. When target cells are dissolved, CTLs are damaged at the same time.
CTLs have specific killing effect.
D. Perforin can induce target cell apoptosis.
E. One CTL can only kill one target cell.
Which cells play major roles in clearing intracellular pathogen infection?
A. Th1 and Th2
B. Th1 and CTL
C. Th2 and CTL
D. Th17 and CTL
E. Tfh and CTL
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