更多"Now the ______ port city near the m"的相关试题:
[单项选择]() in the earthquake thoroughly, the city has now been rebuilt.
A. Destroying
B. Having destroyed
C. Destroyed
D. To be destroyed
[单项选择]淋巴细胞缺失mIg ()
A. 获得性无丙种球蛋白血症(普通变异性免疫缺陷)
B. 重症联合免疫缺损的常染色体隐性遗传形式
C. C8缺损
D. DiGeorge综合征
E. 婴幼儿无丙种球蛋白血症
[单项选择]表达mIg分子的细胞是 ()
A. T细胞
B. B细胞
C. Th细胞
D. Tc细胞
E. NK细胞
[单选题]题目 22
We're sure that the environment in our city _____greatly through our work in the near future.
A.improved
B.was improved
C.has improved
D.will be improved
[单项选择]( )抗干扰能力差,不能采用MIG方法。
A. 焊接机器人
B. 大厚度焊件
C. 超强度板
D. 质量较大构件
[单项选择]检测mIg对B细胞计数通常应用的免疫技术为 ()
A. 荧光抗体技术
B. ELISA
C. 放射自显影
D. 发光免疫测定
E. 金免疫测定
[单选题]熔化极气体保护焊时,亚射流过渡的应用范围只能用于MIG焊( )。
A.铝
B.铜
C.低碳钢
D.不锈钢
[判断题]MIG焊适用于铝及铝合金、不锈钢等材料中、厚板焊接。
A.正确
B.错误
[单选题]MIG焊采用一种介于( )和射流过渡之间的一种特殊形式,称为亚射流过渡。
A.射滴过渡
B.亚射滴过渡
C.短路过渡
D.不饱和射流过度
[单项选择]His production techniques are elaborate and near legendary, but even if they could be ______, it wouldn't be the same for any other people.
A. resembled
B. approximated
C. duplicated
D. undertaken
[判断题]MIG焊采用一种介于短路过渡和射滴过渡之间的一种特殊形式,称为亚射流过渡。
A.正确
B.错误
[单选题]熔化极MIG焊,碳钢中厚板平位对接接头焊接时,选择( )保护气体,焊接工作效率最低。
A.Ar+He
B.Ar+CO₂
C.Ar+H₂
D.Ar
[判断题]MIG钎焊厚度小于1mm镀锌钢板时,直流正极性焊接时焊丝熔化系数比反极性时小,生产效率低。
A.正确
B.错误
[单项选择]You may rely upon it that we can contact your nearest relative ______ any accident occurring.
A. in spite of
B. in the event of
C. in the place of
D. on account of
[判断题]脉冲MIG焊在0.8mm以下钢板对接焊中应用较少,脉冲TIG钎焊则可实现小至0.3mm超薄板的对接焊(悬空平焊,无垫板)。
A.正确
B.错误
[单项选择]The small bar was near a ______.
A. hospital
B. railway station
C. Bus stop
[单项选择]What is Wilmington like now