下列指标中,属于时点指标的是( )。
A.设备台数
B.投资总额
C.商品销售额
D.国内生产总值
参考答案:A
Sally sings pretty _______ and she is also _______ at dancing.
A. well; well B. good; well C. well; good
单纯性大疱性表皮松解症的水疱位于
A.真皮内
B.透明板内
C.致密下层
D.角质层内
E.表皮内