“a的2倍与1的和”用代数式表示是 。
2a+1
根据题意可知a的2倍即为2a，2a与1的和，所以代数式为2a+1
Fundamental analysis most likely requires the analyst to engage in:()
A. extrapolating historical data.
B. performing aggregate market analysis.
C. detecting the beginning of price movements that lead to new equilibrium prices.
女。28岁。右下颌骨体部迅速肿大2个月，经病理确诊为骨肉瘤，为提高疗效，术前考虑化疗。收选的化疗药物为（ ）
A．环磷酰胺
B．顺铂
C．氟尿嘧啶
D．氨甲蝶呤
E．平阳霉素
