【单选题】将产品装入气密性包装容器,密封前在真空度10~30毫米水银柱高的情况下,排除包装内的气体,从而使密封后的容器达到一定的真空度。这种包装方法是( )
【简答题】三、产品规则 系列产品 BOM结构图 三、产品研发 名称 开发费 开发时间 加工费 直接成本 产品组成 P1 1M/季 2季 1M 2M R1*1 P2 1M/季 3季 1M 3M R2*1 R3*1 P3 1M/季 4季 1M 4M R1*1 R3*1 R4*1 P4 1M/季 5季 1M 5M R2*2 R3*1 R4*1 2 . 生产2个P2需要什么原材料 ?
【判断题】体育休闲可以促进人的全面发展、身心并举的有效手段。
【单选题】下列关于指示剂的论述,错误的是()
D.
指示剂的理论变色点是pH=pK HIn ±1
【多选题】根据对话情景选择恰当的选项,其中有两项是多余的。
A.
Are you feeling better?
B.
You should go to see the doctor.
C.
I’m afraid of taking medicine. It tastes terrible.
D.
I’m afraid of catching bad diseases.
E.
I would like to go home.
F.
Follow the doctor’s advice and you’ll get well soon.
G.
You shouldn’t see a doctor. Peter: Hello, John. This is Peter speaking. John: Hello. You sound sad. I heard you had a bad cold. 11 Peter: No. I’m feeling much worse. 12 It makes me so tense. Do you think I’m going to die? John: No, Peter. Calm down and take more exercise. You just had the flu. 13 Peter: But I hate to go to the hospital. 14 John: Don’t be afraid! You are the bravest boy. 15 Peter: Thanks, John.
【单选题】生产2个P2,3个P3,共需要多少个原材料