胎向
参考答案：
是指胎儿身体的纵轴与母体纵轴的关系。在母体内，胎向不发生改变。
– There are 60 students in my class and 45 of them use weibo very often.
– 45? That means about of your classmates are weibo users, right?
A. half B. two thirds C. three quarters
孔子指出“三十而立”，指的是职业发展过程中的（）阶段。
A、确立人生目标与立业
B、创业发展
C、成功
D、维持期
