单选题 Which of the following would be the impedance of an 8 ohm and a 4 ohm speaker that are wired in parallel？（）
2.66 ohms
Less than 1 ohm
4 ohms
12 ohms
单选题 The native resolution for 1080i is（）
1920×1280
1920×1080
1280×1080
1280×720
单选题 A customer notifies the integrator that the system keypad reports trouble at a window. Upon inspection， the customer finds the window closed and locked； the customer resets the system and it fails to correct the issue. Which of the following steps should the integrator take to resolve the issue？（）
Check that the sensor is not misaligned.
Clean the space between the sensor and the plate.
Toggle the tamper switch to reset the sensor.
Bypass the zone.
单选题 Which of the following cabling would be MOST commonly used with digital volume controls？（）
Unshielded twisted pair
RJ-59
16/4 solid conductors
Speaker Wire
单选题 Small in-ceiling speakers are BEST suited for（）
loud， bass intensive music （e.g. heavy metal， rock）.
providing a sub-woofer for great bass reproduction.
background music and blending in with decor.
the user who wants perfect sound reproduction.
单选题 Which of the following communication methods will provide the maximum bandwidth for video streaming through a media extender？（）
100BaseT Ethernet
802.11g
Z-Wave
Bluetooth
单选题 Which of the following is a RF peer to peer mesh protocol used for lighting and other residential electronics？（）
Z-Wave
X10
CEBus
Wi-Fi
单选题 If the speakers in an installation are out of phase， this means that（）
the subwoofer is at the wrong angle.
the front and rear speakers are reversed.
the polarity of the speakers are reversed.
the angle of the speakers are incorrect.
单选题 Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）
The power supply is faulty and should be replaced.
The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.
The radio frequency interference （RFI） is being received as noise.
A plasma display is emitting infrared noise.
单选题 Which of the following is the primary purpose of impedance matched volume control？（）
Maintains proper speaker phase
Protects the amplifier from damage
Protects the digital systems from damage
Amplifies the speaker signal
海南西环高铁于去年底正式开通运营，全球首条环岛高速铁路诞生了。铁路最早出现在（）
影响横封效果的因素有（）
纵向偏离时，每个车辆转向架所承受的货物重量不得超过货车容许载重量的（），且两转向架承重之差不得大于10t。
简述脑梗死的治疗原则。
患者输注少白红细胞悬液约1小时时，出现呼吸急促，大汗淋漓，寒战，腰背部剧痛，心前区压迫感，心率120/分钟，呼吸30/分钟，血压75/45mmHg，体温39.8℃。随即出现血红蛋白尿。最可能的临床诊断是（）
固定资产改良过程发生的变价收入应记入（）。
周作人散文笔调从容闲逸，别有一种平淡悠远的趣味，其作品《零余者》《写在人生边上》都体现了这种风格。
关于女性输尿管下列哪项是正确的（）
采用过户转让的票据多指股票、政府债券和提单等。
中国银行间市场交易商协会（以下简称交易商协会）负责受理企业债务融资工具的发行注册。交易商协会不接受注册的，企业可于( )后重新提交注册文件。
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