商品煤样

Tom kept quiet about the accident ______ lose his job.

A．so not as to

B．so as not to

C．so as to not

D．not so as to

－The temple looks very old.

－You are right. It’s said that it_______more than 300 years ago.

A．took apart

B．came into being

C．went through

D．built up

已知有如下反应：A+B→C+D

（1）若A为Fe，B为CuSO₄（溶液），则C、D的化学式分别是______、______．

（2）若A为HCl（盐酸），B为NaOH（溶液），则该反应的化学方程式为______．

（3）若B为CuO，则A可能是______（答一种）．

（）属于客户服务范围。

A、开辟专栏传授使产品知识

B、社会公关服务，例如赞助希望小学

C、广告宣传

D、销售环境

E、开通业务电话以供产品咨询

开工前，维修单位要编制维修项目（）。

A.验收申请

B.维修标准

C.施工组织方案

D.合同