宗法制的核心内容是嫡长子继承制，即“立嫡以长不以贤，立子以贵不以长”。下列分析正确的

国家计量检定系统表和（）是计量检定必须依据的技术规范。

用合适的词语或句子完成下列对话。

A: Good morning, madam!

B: Good morning, sir!

A: You look worried. __1__?

B: My son got lose when I was talking with my friend in the park.  I've looked for him everywhere, but I

    can't find him. What shall I do?

A: __2__ . Tell us something about him, and we can help you.

B: Thank you, sir.

A: Now please tell me __3__ .

B: He's six years old.

A: __4__ ?

B: He's thin and tall with big eyes.

A: What is he wearing today?

B: He's wearing a white T-shirt and blue jeans.

A: __5__ ?

B:  It's  13803677057.

A: OK. We'll call you as soon as we find  him.

B: Thank you very much.

远期利率协议的买方相当于（）。

A.名义借款人

B.名义贷款人

C.实际借款人

D.实际贷款人

某医务室测定10名工人在工前、工中及工后4小时的尿氟浓度(μmol/L)，结果见表2。

工前、工中、工后的各不相同，这反映了（）。

A．SS_总

B．SS_处理

C．SS_组内

D．SS_配伍

E．SS_误差

简述煤气着火事故的处理方法。