霍乱引起鼓肠、心律失常的原因是（）
A.大量失水
B.大量盐类丧失
C.多量失钾
D.多量失钠
E.酸中毒
参考答案：C
用括号内单词的适当形式填空。
1. Here _____ (be) your library card
2. I want _____ (buy) a new computer.
3. You can _____ (find) out the answer to the question.
4. Where _____ (be) the book about animals? .
5. They are going to make a big hamburger in two _____ (day) time.
油气田生产设施一级动火证应由现场油田总监审批。
