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【单选题】
影响健康的五大因素包括生活方式、环境、生物学、心理因素和卫生服务。下列哪项属于生活方式影响因素（）A.
细菌和病毒侵袭感染
B.
职业变更
C.
喜吃麻辣食品
D.
家庭遭遇变故
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反馈参考答案：
举一反三
【单选题】具有二次谐波制动的差动保护,为了可靠躲过励磁涌流,可
A.
增大“差动速断”动作电流的整定值
B.
适当减小差动保护的二次谐波制动比
C.
适当增大差动保护的二次谐波制动比
D.
0
【单选题】Dick lived in England. One day in January he said to his wife, "I'm going to fly to New York next week because I've got some work there." "Where are you going to stay there?" his wife asked. "I don't ...
A.
The manager( 经理） of his hotel
B.
The police office
C.
The taxi driver
D.
His wife
【单选题】Dick lived in England. One day in January he said to his wife, "I'm going to fly to New York next week because I've got some work there." "Where are you going to stay there?" his wife asked. "I don't ...
A.
The manager( 经理） of his hotel.
B.
The police office.
C.
The taxi driver.
D.
His wife.
【单选题】用a，b，c表示任一有理数，若a，b，c在数轴上的位置如图所示，则a，b，c所表示的数是（ ）
A.
a，b，c均为正数
B.
a，b，c均为负数
C.
a，b是正数，c是负数
D.
a，b是负数，c是正数
【单选题】具有二次谐波制动的差动保护为了可靠躲过励磁涌流,可( )。
A.
增大“差动速断”动作电流的整定值
B.
适当增大差动保护的二次谐波制动比
C.
适当减小差动保护的二次谐波制动比
D.
以上说法均不正确
【单选题】Dick lived in England. One day in January he said to his wife, "I'm going to fly to New York next week because I've got some work there." "Where are you going to stay there?" his wife asked. "I don't ...
A.
he went there for a holiday
B.
He had work there
C.
He went there for sightseeing( 观光）
D.
His home was there
【单选题】AO 表示 DDC 的模拟输出量, DO 表示 DDC 的数字输出量, DI 表示 DDC 的数字输入量。字母A表示( ),字母D表示( )。
A.
A表示模拟量,D表示数字量;
B.
A表示数字量,D表示模拟量;
C.
A表示输入量,D表示输出量;
D.
A表示输出量,D表示输入量;
【简答题】在数轴上分别画出点A、B、C、D，点A表示数 1 3 ，点B表示数 1 2 5 ，点C表示数 9 4 ，点D表示数3.25，并将点A、B、C、D所表示的数用“＞”连接．
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