皮皮学，免费搜题
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【单选题】
V模型指出，对程序设计进行验证A.
单元和集成测试
B.
系统测试
C.
验收测试和确认测试
D.
验证测试
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】计算： tan45°-2sin60°+ 2 2 cos45°-co s 2 30° ．
【简答题】droplet transmission
【简答题】计算： ① 3 sin60°+tan60°-2cos 2 30° ② cos60° 1+sin60° + 1 tan30°
【单选题】听力原文：Why don't I take notes at the meeting for you? (A) It's tomorrow at 3:30. (B) Yes, we have it in our records. (C) Thanks, I'd really appreciate that. (33)
A.
B.
【简答题】计算：sin30°tan45°-cos 2 30°tan 2 30°．
【简答题】计算 （1）2cos 2 30°+4sin60°?cos45°-tan30° （2） 2cos30°+tan45°-tan60°+( 2 -1 ) 0 ．
【简答题】听下面一段对话，回答第1-3小题。 1. What time will the plane take off? [ ] A．11:30. B．10:30. C．9:30. 2. Why does the man think that it should be a good trip? [ ] A．Because he will sit by the window. B．Becaus...
【单选题】Take a seat please.
A.
You are welcome.
B.
No I will stand.
C.
Thank you.
D.
It's doesn't matter.
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