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【单选题】
酸性焊条的主要优点之一是（）。A.
渗合金的效果较好
B.
有助于脱硫、磷
C.
抗气孔能力较强
D.
熔敷金属冲击韧性较高
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【简答题】正常成人的血压是收缩压 100~120mmHg , 用国际单位制表示是多少 Pa( )
【简答题】Have you ever seen snow? Many people in the world have not. Some countries never have snow; some have only a little on the tops of very high mountains. In the north of England, there is quite a lot of...
【单选题】These countries ________ too many wars since ancient time.
A.
went through
B.
have gone by
C.
went by
D.
have gone through
【简答题】12 正常成人的血压是收缩压 100~120mmHg ,舒张压 60~90mmHg ,用国际单位制表示是多少 Pa? 第二章流体静力学--2作业.docx
【单选题】下列关于甲状腺功能亢进症的说法中不正确的是
A.
甲亢是由甲状腺功能亢进所致的一种甲状腺毒症
B.
甲亢分为原发性和继发性甲亢，其中继发性甲亢最常见
C.
甲亢在女性、有家族史、有精神创伤和感染者中发病率较高
D.
甲亢发病与环境因素密切相关
E.
毒性弥漫性甲状腺肿，又称为弥漫性甲状腺肿伴甲亢
【简答题】The Middle East countries and other world powers have been facing major political tensions which have made the stability of the crude oil prices very unpredictable. Each day the prospect（前景）of oil pri...
【单选题】everal countries have already passed laws banning disciplinary action that inflicts mental suffering on a child, and Straus views them as models to .
A.
stimulate
B.
formulate
C.
animate
D.
emulate
【单选题】Sub-Saharan African countries ______.
A.
will have the largest world population by 2020
B.
have the highest reproductive rate in the world
C.
are only modestly affected by AIDS
D.
will have increasingly long life spans
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