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【单选题】
腹股沟斜疝与直疝在解剖上的区别，下列哪项是正确的A.
斜疝与腹横筋膜薄弱有关，直疝与腹内斜肌薄弱有关
B.
斜疝由腹壁下动脉内侧发生，直疝则由外侧发生
C.
斜疝的内环在凹间韧带内侧，直疝在内侧
D.
斜疝疝囊在精索后方，直疝在前方
E.
斜疝自内环处发生，沿精索发展；直疝则由海氏三角处发生，不沿精索发展
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【单选题】The law requires that all motor cars regularly for safety and efficiency.
A.
have to be tested
B.
must be tested
C.
be tested
D.
to be tested
【单选题】The law requires all cars _______ for safety and efficiency. A. being tested regularly B. to be regularly tested C. be regularly tested D. regularly tested
A.
选择1
B.
选择2
C.
选择3
D.
选择4
【单选题】以下关于网络物理隔离技术的描述中，错误的是(42)。
A.
内网与外网(或内网与专网)永不连接
B.
内网与外网(或内网与专网)的数据交换采用渡船策略
C.
每一次数据交换，都需要经历数据写入和数据读出两个过程
D.
内网和外网(或内网勺专网)在同一时刻最多只有一个物理隔离设备建立TCP/IP数据连接
【单选题】用什么制备单克隆抗体的骨髓瘤细胞与经绵羊红细胞免疫过的B淋巴细胞分别具有什么特点( )
A.
骨髓瘤细胞能无限增殖，B淋巴细胞能分泌抗体。
B.
骨髓瘤细胞能分泌抗体，B淋巴细胞能无限增殖。
C.
骨髓瘤细胞在HAT培养基中能无限增殖，B淋巴细胞则不能分泌抗体。
D.
骨髓瘤细胞在HAT培养基中不能增殖，B淋巴细胞则能无限增殖。
【单选题】The law requires all cars _______ for safety and efficiency.
A.
being tested regularly
B.
to be regularly tested
C.
was regularly tested
D.
regularly tested
【单选题】The law requires all cars _______ for safety and efficiency.
A.
being tested regularly
B.
to be regularly tested
C.
be regularly testing
D.
regularly tested
【单选题】.The law requires all cars _______ for safety and efficiency.
A.
being tested regularly
B.
to be regularly tested
C.
be regularly tested
D.
regularly tested
【单选题】The law requires all cars _________ for safety.
A.
regularyly tested
B.
to be regularly tested
C.
being regularly tested
D.
having to be regularly tested
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