如果旁站监理人员或施工企业现场质检人员未在旁站监理记录上签字，则（）。 A.施工企业

从A、B、C、D四个选项中找出一个错误的并改正。

1. He and his friends had a fun playing basketball. _____

              A                    B    C            D

2. Tom borrowed these new shoes to Jim last night. _____

                    A           B   C               D

3. He didn't went to school last week. _____

     A               B   C                       D

4. Jack went to see his teacher and asks some questions. _____

                      A  B                               C    D

5. He drove his new car and stoped in the street yesterday. _____

             A            B                   C                   D

减速器所使用的润滑油必须为规定品牌及规定类型，不同的润滑油（）混合使用。

A、可以

B、不全部

C、少量

D、禁止

不可用冷疗的病情是

A．鼻出血
B．头皮下血肿的早期
C．中暑
D．压疮
E．牙痛

销售净利率

溶液的pH值与pOH值之和是（）。

A.12

B.14

C.10

D.13