设计半包价旅游的主要目的是（）A．降低销售成本 B．降低经营费用 C．降低组团成本

The nurse formulates a nursing diagnosis of Activity intolerance related to inadequate oxygenation and dyspnea for a client with chronic bronchitis. To minimize this problem, the nurse instructs the client to avoid conditions that increase oxygen demands such as the following

A. drinking more than 1,500 mL of fluid daily.
B. eating a high-protein snack at bedtime.
C. eating more than three large meals per day.
D. being overweight.

垂体嗜酸性细胞瘤的照射剂量的是()

A.30Gy

B.40Gy

C.45~50Gy

D.60Gy

E.70Gy

可转换公司债券与一般债券相同，有固定的利息来源。 ( )

观察法是在真实的自然条件下进行的研究，因而观察结果真实可靠。