某企业被依法宣告破产前，曾与甲公司签订买卖合同并由乙公司作为该企业的保证人提供了担保

It is said that in the Tang Dynasty a man named Zhang Hui visited the city of Song where he came upon an old man sitting beside the road,  1  a bag near him,  2  （read）a book in the moonlight. He asked what was in the bag, and the old man explained   3  it was full of red strings 4 （use）to tie together people destined to marry. Once people were tied together,  5   was no way that they could avoid marriage.  6 , he told Zhang Hui that he  7  （tie）him to a wife.

Zhang Hui felt it funny and went on  8  way. Not long afterward he met the wife   9   had been tied to him and they were married. This is why a matchmaker is sometimes called an “Old Man in the Moonlight” or   10 （simple）“Old Moonie”（月佬）.

二乙氨基二硫代甲酸钠光度法测定铜含量是在酸性条件下进行的。而吡啶偶氮间苯二酚比色法测定铜含量则是在碱性溶液中进行的。

按照任期与任用方式的不同，行政机关的公务员可以分为( )。

A．政务类公务员

B．领导职务公务员

C．业务类公务员

D．非领导职务公务员

E．行政公务人员

按照《中华人民共和国药品管理法》，药品检验机构的设立

A．由卫生部设置

B．由药品监督管理部门确认

C．由卫生部确认

D．由工商部门确认

E．由药品监督管理部门设置

在一定条件下，含水层的给水度可以是（），也可以是一个（）。