单一法人制企业所涉及的财务活动领域相对较窄，所以面临的财务风险较小。
参考答案：错
某种植物生长的适宜温度不能低于18℃．也不能高于22℃．如果该植物生长的适宜温度为x℃．则有不等式______．
—Could you please come to the museum with me this afternoon?
—Sorry, I ______. I have to take a piano lesson at 2 pm. [ ]
A. couldn't
B. mustn't
C. can't
D. needn't
