投资决策阶段的风险主要包括（）、融资风险等。
A．环境风险
B．技术风险
C．工程风险
D．政策风险
参考答案：D
She felt completely during the vacation but now she has to go back to her work again.
A．at sea
B．at ease
C．at a loss
D．at risk
疟疾确诊主要依靠（）
A.血培养
B.凝集试验
C.血涂片
D.大便培养
E.血常规
again.