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【单选题】
引起蜡样芽孢杆菌食物中毒最常见的食物是()A.
米饭、米粉
B.
水果
C.
蛋类
D.
败肉类
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反馈参考答案：
举一反三
【单选题】关于力的投影,下列说法正确的是?
A.
力在轴上的投影是矢量，有大小和方向。
B.
力的投影大小与分力大小相等。
C.
力在轴上投影的正负号主要是看力矢量箭头指向。
D.
力的投影必须满足平行四边形法则。
【简答题】在图示平面桁架中，所有杆件的E皆相同，CA，AB，BF三杆的横截面面积为30cm 2 ，其余各杆的截面面积均为15cm 2 。a=6m，F=130kN。试求AB杆的轴力。
【单选题】听力原文：M: Anne, are you sure you'd like to have a house in Lark Green? Don't you think it a bit too far from town? W: I'd love to live there, Jack. I think the building site there is perfect. Open count...
A.
It's a delightful little town.
B.
It has a marvelous view.
C.
It is not far from the town.
D.
The house is built in open country.
【单选题】Green building does not specifically emphasize the issue of the________ existing homes.
A.
retrofitting
B.
producing
C.
responsible
D.
sustainable
【单选题】Green tourism does not create green jobs, including sustainability operations, energy efficiency and renewable technologies, environmental management, natural resource conservation, smart growth, buil...
A.
Yes
B.
No
C.
Both
D.
Neither
【简答题】在迈克尔逊干涉仪中，当观察到圆环形干涉条纹时，这是属于 干涉
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