人口素质中最本质的内容有
A．身体素质
B．心理素质
C．能力素质
D．文化素质
E．思想素质
参考答案：A,D,E
According to the weather forecast, which is usually ______, it will snow this afternoon.
A．exact
B．precise
C．perfect
D．accurate
弧形梁的纵筋，分几步才能计算出来？
