下列叙述错误的是（ ）
A．乙醇能和金属钠反应放出氢气
B．醋酸的酸性比碳酸强
C．油脂属于酯类物质
D．糖类都能发生银镜反应
答案：D
Greatly moved by her words, _____.
A．tears came to his eyes
B．he could hardly hold back his tears
C．tears could hardly be held back
D．his eyes were filled with tears
生产单克隆抗体细胞的培养方法最常用（）
A.液体培养
B.半固体培养
C.鸡胚培养
D.固体培养
E.动物接种
