按路线前进方向,后一边延长线与前一边的水平夹角叫(),在延长线左侧的转角叫左转角,在延长线右侧的转角叫()角。
参考答案:转角;右转
The problem is so complex that I'm afraid it will take me several hours to________.
A.put out
B.set out
C.break out
D.figure out
头期胃液分泌的调节是
A.纯条件反射
B.纯非条件反射
C.纯神经调节
D.纯体液调节
E.神经-体液调节