原子荧光法测定海水中砷的方法原理为：在酸性介质中，五价砷被硫脲-抗坏血酸还原成（），

（根据所给的首字母或中文写出适当的单词）

小题1:The _______(运动员) were warming up before the game when I got there.

小题2:In case of e________, to stay calm is the most important thing.

小题3:She didn’t give any _____________(解释，说明） for her being absent from the meeting .

小题4:The coldest place is in one area of Antarctica with the a_______ temperature of 58 degrees below zero.

小题5:I told my mother about my plan to leave school but wasn’t __________(批准）

小题6:Though he has made a mistake, as a good boy, he d________ to be given another chance.

小题7:They had only one week to make __________ （准备）for the wedding.

小题8:All her spare time was d__________ to helping the poor children in stricken areas(灾区), so she had no time to take care of her family.

小题9:She felt __________ （尴尬的）about the examination result and didn’t want to talk to her parents about it.

小题10:He didn’t like his daughter’s boyfriend and f_______ him to enter the house.

持票人对票据债务人行使票据权利，或者保全票据权利，应当在票据当事人的营业场所和营业时间内进行，票据当事人无营业场所的应当：

A．由票据当事人协商确定履行地点

B．由持票人决定履行地点

C．由票据债务人决定履行地点

D．在票据当事人的住所履行

简述合作开发合同当事人违约行为的主要表现。

侧向分型抽芯机构出现故障如何排除。

军团病的临床表现有（）

A.肺炎型

B.发热型

C.肺外感染型

D.A+B

E.A+B+C