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【单选题】
认为新的技术发展会带来新的危险源，安全工作的目标就是控制危险源，努力把事故发生概率降到最低．这一观点是包含在____理论中的．A.
海因里希因果连锁
B.
事故频发倾向
C.
系统安全
D.
能量意外释放
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举一反三
【单选题】My family has _____________ members. They are my parents, my brother and me. [ ]
A.
three
B.
four
C.
five
【单选题】My brother_________ Beijing many times. He __________ Nanjing for a week.
A.
has been to, has gone to
B.
has been to, has been in
C.
has gone to , has been in
D.
has gone to, has been in
【单选题】对心直动尖顶推杆盘形凸轮机构的推程压力角超过许用压力角许用值时,可采用 措施来解决。
A.
增大基圆半径
B.
改用滚子推杆
C.
改变凸轮转向
D.
改为偏置直动尖顶推杆
【简答题】成人骨头共有208块，分为头颅骨、躯干骨、上肢骨、下肢骨四个部分。判断对错
【简答题】阅读理解，判断正(√)误(×)。 My family has four members. My dad, my mom, my brother and me. My dad is a baseball player. He is tall and strong. He likes computer s. My mom is a nurse. She has long hair and bi...
【单选题】My sister-in-law___________ my brother for ten years.
A.
married with
B.
has married
C.
has been married with
D.
has been married to
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