陈皮含量测定的质量控制成分是（） A.大豆素 B.白果内醌 C.香豆素 D.芦丁 E

(71) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (72) for designing and constructing an improved system. (73) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (74) . (75) is another such technique that integrates data and process concerns into constructs called objects.

A．image
B．picture
C．layout
D．blueprint

别名为安息香酸的是

A．柳酸
B．醋酸
C．磷酸
D．硼酸
E．苯甲酸

X、Y、Z、W四种元素在周期表中相对位置如表所示，已知X、W质子数之和为22，下列说法中不正确的是

A. X、Y、Z、W四种元素的单质中可能有离子晶体

B. X、Y、W的氢化物中，Y的氢化物沸点最高

C. Z的阳离子与Y的阴离子电子层结构相同

D. XW₂分子中各原子的最外层电子均满足8电子稳定结构

施肥诊断法 diagnosis method of fertilization

肛门体温38.2℃属于（）.

A、正常

B、低热

C、高热