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【单选题】
.在寒冷环境中，下列哪项叙述正确A.
甲状腺激素分泌增加
B.
能量代谢率降低
C.
皮肤血管舒张
D.
交感神经的紧张性降低
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【简答题】曲柄连杆机构是发动机实现工作循环完成能量转换的主要运动机构。它由机体组和________。
【单选题】The book ______forty maps, ______three of Great Britain.A．contains; includesB．is containing; inc
A.
25. The book ______forty maps, ______three of Great Britain. A．contains; includes
B.
is containing; including
C.
includes; contains
D.
contains; including
【单选题】Every boy and every girl as well as some tachers who____to visit the museum____asked to be at the school gate before 6: 30 in the moming. A. are; are A.is; is C. are; is D. is: are
A.
1
B.
2
C.
3
D.
4
【单选题】The sick boy _________to hospital by the police yesterday．A．is takenB．was takenC． t
A.
25． The sick boy _________to hospital by the police yesterday． A．is taken
B.
was taken
C.
takes
D.
took
【简答题】曲柄连杆机构是发动机实现工作循环完成能量转换的主要运动机构。它由机体组和________。 二、单项选择____
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