2021军招军考《军考类》真题模拟01-26

1、______ no gravity, there would be no air around the earth.（单选题）

A. Were there

B. There were

C. Was there

D. There be

试题答案：A

2、10名学生中要选出3名代表，一共有（　　）种不同的选法．（单选题）

A. 120

B. 240

C. 600

D. 720

试题答案：A

3、在下列操作中，仪器间不应接触的是（　　）．
①用胶头滴管向试管内滴液时，尖嘴与试管口或试管壁
②向容量瓶注入液体时，玻璃棒与容量瓶壁
③向试管内注入液体时，试剂瓶口与试管口
④检验试管内是否有氨气产生时，石蕊试纸与试管口（单选题）

A. ①②③④

B. 只有①③④

C. 只有①④

D. 只有②③④

试题答案：C

4、Please give Jim the schedule for tomorrow’s conference when he _____ back. He is to chair the conference.（单选题）

A. will come

B. come

C. comes

D. came

试题答案：C

5、As long as you keep on ______ hard, you’ll get promoted sooner or later.（单选题）

A. work

B. be working

C. worked

D. working

试题答案：D