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【简答题】
变频器按开关方式分成几类?
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知识点:
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皮皮学刷刷变学霸
举一反三
【多选题】《国务院关于预防煤矿生产安全事故的特别规定》列举的15种必须排除的煤矿重大安全隐患和应当及时改正的严重违法行为包括( )。
A.
超能力、超强度组织生产
B.
通风系统不完善、不可靠的
C.
超层越界开挖
D.
年产4万吨没有使用双回路供电系统
E.
煤矿改制完成后,未重新取得三证一照的
【简答题】There are several reasons why he (Kissinger) no longer appears to be the magician the world press had made him out to be, an illusion which he failed to discourage because, as he would admit himself, ...
【单选题】女性,74岁,反复咳嗽、咳痰20余年,伴心悸、气促、下肢间歇性水肿5年,病情加重伴畏寒发热2天入院。体检:T:38.6℃,呼吸急促、嘴唇发绀,双肺叩诊过清音,中下肺有湿啰音,心率106次/分,心律齐,无杂音,双下肢水肿。为明确诊断首选下列哪种检查()
A.
支气管镜检查
B.
痰培养及药敏试验
C.
动脉血气分析
D.
心电图检查
E.
胸部X线检査
【简答题】to depress, depressive, depression: Stress appears to have a________ effect on the immune system. Stress can_______ the immune system.
【简答题】Stress appears to have a________ effect on the immune system. Stress can________ the immune system. ( to depress, depressive, depression )
【简答题】Unless an electronic record contains a specific date of issuance, the date on which it appears to have been sent by the ______ is deemed to be the date of issuance. The date of receipt will be deemed ...
【单选题】Even though computer screens don’t radiation, the stress from staring over long periods can cause harm to your vision.
A.
give off
B.
give in
C.
give up
D.
give away
【简答题】106x74=
【多选题】普萘洛尔的降压机理包括
A.
进入 中枢 ,阻断中枢β受体,降低外周交感活性
B.
阻断 心脏 β1受体,降低心排出量
C.
阻断 肾 小球旁器的β1受体,减少肾素释放,抑制RAS系统;
D.
• 阻断外周NA能神经末梢突触前膜β2受体,抑制正反馈,减少NA释放 • 促进前列环素生成。
【单选题】关于企业文化“硬”的方面,下列不正确的是()。
A.
技术活动
B.
福利活动
C.
娱乐活动
D.
员工的思想意识
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