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问题
填空题
计算：a（a+2）（a﹣3）=
_________
答案
a3﹣a2﹣6a
选择题
There are _____ teachers in the school hall, and _____ them are women teachers.
A. hundred of; two hundreds
B. hundreds of; two hundred of
C. hundreds of; two hundred
D. hundred of; two hundred of
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单项选择题 A1型题
腹泻病伴低钾血症临床表现错误的是（）
A.腱反射迟钝或消失
B.腹胀、肠鸣音减弱
C.心音低钝
D.心电图示T波高尖
E.精神萎靡
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