具有解痉、镇痛、散瞳功效的是( )
A．马兜铃酸B．莨菪碱C．麻黄碱D．吗啡E．小檗碱
参考答案：B
解析：[知识点] 苷键的裂解
If the market prices of each of the 30 stocks in the Dow Jones Industrial Average (DJIA) all change by the same percentage amount during a given day, which stock will have the greatest impact on the DJIA（）
A. The one whose stock trades at the highest dollar price per share.
B. The one whose total equity has the highest market value.
C. The one having the greatest amount of equity in its capital structure.
下列说法不正确的是（ ）
A．用稀盐酸检验氢氧化钠是否变质
B．点燃氢气前一定要先检验氢气的纯度
C．除去氧化钙中的碳酸钙，加入足量的水，然后过滤
D．家中天然气 装置漏气时，应先关闭阀门，并打开门窗
