问题
单项选择题
耐热肠毒素的检测方法是（）
A.兔肠段结扎法
B.皮肤毛细血管通透性试验
C.Elek法
D.乳鼠灌胃法
E.豚鼠眼结膜法
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
耐热肠毒素的检测方法是（）
A.兔肠段结扎法
B.皮肤毛细血管通透性试验
C.Elek法
D.乳鼠灌胃法
E.豚鼠眼结膜法
参考答案：D
Passage Four
Why did IBM decide to sell its PC business
A．Because IBM has been brewing this sale for about 10 years.
B．Because IBM is going to produce mobile phones that have access to the Internet.
C．Because IBM can enlarge its PC sales with this merger.
D．Because IBM no longer enjoys any edges in PC making.