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【单选题】
计算中电压、电流的参考方向的选取原则( )。A.
与实际方向选得一致
B.
任意选取
C.
电压与电流的方向必须选得一致
D.
电压与电流的方向必须选得相反
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反馈参考答案：
举一反三
【单选题】查看材料
A.
She was an excellent student at college．
B.
She works in the entertainment business．
C.
She is fond of telling stories in her speech．
D.
She is good at conveying her message．
【单选题】男孩，5岁。白幼唇、指(趾)甲床青紫，乏力，活动后气促，体格发育落后，胸骨左缘第2～ 3肋间可闻及Ⅲ级收缩期杂音，经超声心动图证实为先天性心脏病，法洛四联症。 此患儿其心脏由哪4种畸形组成( )。
A.
主动脉狭窄，室间隔缺损，肺动脉骑跨，右心室肥厚
B.
主动脉狭窄，房间隔缺损，主动脉骑跨，左心室肥厚
C.
肺动脉狭窄，室间隔缺损，主动脉骑跨，右心室肥厚
D.
肺动脉狭窄，房间隔缺损，肺动脉骑跨，左心室肥厚
E.
肺动脉瓣狭窄，房间隔缺损，主动脉骑跨，右心室肥厚
【简答题】glance vi. n. ____
【简答题】男孩，5岁。自幼唇、指（趾）甲床青紫，乏力，活动后气促，体格发育落后，胸骨左缘第2～3肋间可闻及Ⅲ级收缩期杂音，经超声心动图证实为先天性心脏病，法洛四联症。此患儿其心脏由哪4种畸形组成A、主动脉狭窄，室间隔缺损，肺动脉骑跨，右心室肥厚 B、主动脉狭窄，房间隔缺损，主动脉骑跨，左心室肥厚 C、肺动脉狭窄，室间隔缺损，主动脉骑跨，右心室肥厚 D、肺动脉狭窄，房间隔缺损，肺动脉骑跨，左心室肥厚 E、肺动...
【单选题】The writer admires Mrs. Phillips because _______.
A.
she was an excellent cook
B.
she was in command of all the servants
C.
she could keep secrets
D.
she knew everything that went on
【简答题】decline n./vi.
【单选题】She was an excellent teacher, whose courses on women's writing were very popular among the students
A.
optional
B.
modify
C.
prime
D.
spouse
【单选题】She was an excellent teacher, whose ___ courses on women ’ s writing were very popular among the students.
A.
conceptional
B.
rational
C.
exceptional
D.
optional
【单选题】She was an excellent teacher, whose _____ courses on women's writing were very popular among the students.
A.
optional
B.
symbolic
C.
exceptional
D.
plausible
【简答题】n./vi. 呼吁,恳求
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