多项选择题 “画饼充饥”表明()
填空题 普通30W直管紫外线新灯管的辐照强度应≥()为合格,使用中紫外线灯管辐照强度应≥()为合格。A.90μW/cm2B.80μW/cm2C.70μW/cm2D.120μW/cm2
单项选择题 M:Look!The sun is shining.There’s no wind,only a pleasant breeze.It’s lovely.Let’s go and take a walk in the park.W:Look at the sky.Don’t you think there’s going to be a storm?Q:What does the woman mean?()