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【单选题】
下列不属于影响生育力的金属元素是A.
铁
B.
铅
C.
镉
D.
汞
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【单选题】There are three major types of airports: military airports, ------- aviation airports, and commercial airports.
A.
common
B.
general
C.
ordinary
D.
important
【单选题】关于泵的下列说法中准确的是____。
A.
泵的有效功率即泵传递给液体的功率
B.
泵的总功率是容积效率、水力效率、机械效率之和
C.
泵允许吸上真空度和必需汽蚀余量都可由同样的汽蚀实验求出
D.
泵的允许吸上真空度标示泵的自吸能力
【简答题】听对话，回答问题： 1. Whose keys did the man see? [ ] A. Julia's B. Dad's C. Linda's 2. Julia's keys are ______. [ ] A. under the table B. in her pocket C. on the table
【单选题】Army ______ may include military bases, airports and even hospitals.
A.
machines
B.
instruments
C.
equipment
D.
facilities
【简答题】选择句子补全对话。 A. Yes! B. The keys? They're on the table. C. No, they aren't. D. How about my books? E. It's under the sofa. A: Hey, Susan! B: 1 . A: Is my computer on the table? B: No, it isn't. It's...
【简答题】在原始凭证上书写阿拉伯数字，错误的做法是（ ）。
【单选题】关于泵的下列说法中准确的是____。
A.
泵的有效功率即泵传递给液体的功率
B.
泵的总功率是容积效率、水力效率、机械效率之和
C.
泵允许吸上真空度和必需汽蚀余量都可有同样的汽蚀实验求出
D.
泵的允许吸上真空度标示泵的自吸能力
【简答题】请用所给的代词填空。 this, that, these, those 1. These keys are mine. _____________ are yours. 2. What's _____________? It's an egg. What's _____________ over there? It's an orange. 3. Look at _____________ pe...
【简答题】Conversntion 1. Who used the car this moring? A. The son B. The aunt C. The mother 2.Where are the keys found? A. In the purse B. In the pocket C. In the drawer
【简答题】比较下列聚合物玻璃化温度的大小:聚氯乙烯、聚异丁烯、聚偏二氯乙烯、聚碳酸酯?
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