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【多选题】
Course summary design is one of the most important parts for creating a course, which required top design for the whole course including course background, course objectives, design principles, learning outcomes, learning methods to guide next steps. Course BackgroundA.
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B.
Course summary design is one of the most important parts for creating a course, which required top design for the whole course including course background, course objectives, design principles, learning outcomes, learning methods to guide next steps. Course Background
C.
Course summary design is one of the most important parts for creating a course, which required top design for the whole course including course background, course objectives, design principles, learning outcomes, learning methods to guide next steps. Course Background
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【单选题】设定一个第几件折扣数,当购买的商品数量达到这个数量时,本件商品即享受优惠折扣,下一件商品再重新计数,以此类推。 例如:商品一口价5,商品件数4,总运费4,第三件5折。成交金额是()。
A.
18
B.
19
C.
20
D.
21
【简答题】商品一口价5,商品件数4,总运费4,第三件5折。求成交总金额?
【单选题】有的抗原称为胸腺依赖性抗原(TD-Ag)是因为( )
A.
TD-Ag不需要T细胞辅助即可直接激活B细胞产生抗体
B.
TD-Ag刺激机体在胸腺内产生抗体
C.
TD-Ag在胸腺中被加工、处理后刺激机体产生抗体；
D.
TD-Ag需要T细胞辅助才能激活B细胞产生抗体的抗原
E.
TD-Ag只能引起细胞免疫，不能引起体液免疫