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【单选题】
定子绕组串联电阻的降压启动是指电动机启动时,把电阻串联在电动机定子绕组与电源之间,通过电阻的分压作用来( )定子绕组上的启动电压。A.
提高
B.
减少
C.
加强
D.
降低
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【单选题】—I wonder if she _______ to the party. —She is sure to come if it _______ rainy tonight. [ ]
A.
comes; hasn't
B.
will come; doesn't
C.
comes; will
D.
will come; isn't
【单选题】胸腺和骨髓所培养成熟的细胞是
A.
中枢免疫器官和外周免疫器官
B.
中枢免疫器官、免疫细胞和黏膜免疫系统
C.
T淋巴细胞和B淋巴细胞
D.
免疫器官、免疫细胞和免疫分子
E.
免疫系统的组成是
【简答题】She is sure to come unless she has some urgent business . ,她一定会来的。
【简答题】Be sure to come to the City Gallery! Amy Kim is one of the best-known Chinese 51 in the world today, and some of her most famous 52 are on display in this exhibition. She has something for 53 . There ...
【单选题】Mary is sure to come for dinner if she ________ time this evening. [ ]
A.
has
B.
will have
C.
had
D.
is having
【简答题】以2人为一组,分工合作,任选一个题目,完成小论文。 要求:1、字数不少于500字,用A4信签纸完成。 2、手写完成。打印无分。 3、可以用各种数据库查找资料,但不许抄袭文献。抄袭超过30%者不及格。 题目:1、浅谈有机化学实验发展现状及前沿 2、有机化学实验安全的重要性。
【单选题】Trying to set a good example for his team members, he was always the first one to practice and the last one.
A.
leaving
B.
having left
C.
being left
D.
to leave
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