不可抗力事件,是指发生不能预见、破坏不能防止、损失不可避免的客观情况。
参考答案:对
用所给单词的适当形式完成下列句子。
1. There are many (dish) on the table.
2. When (do) you arrive here yesterday?
3. Jenny usually (eat) lunch at home.
4. Danny and Jenny can speak a little (China).
5. How many (bus) are there in front of the park?
血浆渗透压的变化只有多少时,即可引起血管升压素分泌的调节()
A.不足1%
B.不足2%
C.不足3%
D.不足5%
E.5%以上