使用4G终端产品，上网速度慢应该选择（） A.换内存 B.打开4G开关 C.人品有问

根据所给要求，改写下列句子，每空格限填一词。

1. Lily had a good time during her stay in Beijing. (改为否定句)

    Lily ________ ________ a good time during her stay in Beijing.

2. We have a class meeting once a week. (对划线部分提问)

    _________ _________ do you have a class meeting?

3. Many countries make laws to stop smoking in public. (改为被动语态)  

    Laws _________  _________ by many countries to stop smoking in public.

4. The river pollution is serious in our country today. (改为感叹句)  

    _________ _________ the river pollution is in our country today!

5. Robert is so short that he can't yet reach the pears on the table. (改为简单句)  

    Robert isn't _________ _________ to reach the pears on the table.

6. I can't give you better advice than that. (保持原句意思)  

    I can _________ give you _________ advice.

7. Bill didn't go to bed until he finished writing the letter at 11:45 last night. (保持原句意思)  

    Bill _________ _________ until he finished writing the letter at 11:45 last night.

为明确诊断，应首先进行的检查是

A．血、尿淀粉酶

B．便常规和隐血

C．腹部CT

D．胃镜

某矩形截面柱，截面尺寸为400mm×400mm，混凝土强度等级为C20（fxc=9.6MPa），钢筋采用HRB335级，对称配筋。在下列四组内力组合中，哪一组为最不利组合？（）

A.M=30kN·m，N=200kN

B.M=50kN·m，N=300kN

C.M=30kN·m，N=205kN

D.M=50kN·m，N=305kN

在诉讼过程中，神码电子公司、连发生物技术公司、广宁公司、甲公司、乙公司的诉讼地位如何其案件是否可以合并审理为什么