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【多选题】
带电灭火时，为防止发生人身触电事故，必须注意（）A.
扑救人员及所使用的灭火器材与带电部分必须保持足够的安全距离。并绝缘手套
B.
不准使用导电灭火剂对有电设备进行灭火
C.
使用水枪带电灭火时，扑救人员应穿绝缘靴、戴绝缘手套并水枪金属喷嘴接地
D.
在灭火中电气设备发生故障，如电线断落在地上，局部地区会形成跨步电压，在这种，浩扑救人员必须穿绝缘靴〔鞋）
E.
扑救架空线路的火灾时，人体与带电导线之间的仰角不应大于450，并在线路外侧，以防导线断落触及人体发生触电事故
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举一反三
【单选题】Acute hepatitis B occurs during _________ after acquiring the hepatitis B virus.
A.
the first one to four months
B.
the first one to six months
C.
the first one to five months
【单选题】Whatdoes“takearaincheck”mean?
A.
Going to the bank on a raining day.
B.
Bouncing the check.
C.
Not accepting the invitation now, but might be able to next time.
D.
Refusing to go to an appointment because it rains too much.
【单选题】若有如下定义和语句: double x=1.5; x++; 则以下叙述中正确的是
A.
x 是实型变量，不可以做自增 1 运算
B.
变量 x 经自增 1 运算后的值是 2.5
C.
变量 x 经自增 1 运算后的值是 1.6
D.
变量 x 经自增 1 运算后的值是 2.0
【单选题】Whatdoes the woman think of table wines?
A.
They come in a great variety.
B.
They do not make decent gifts.
C.
They do not vary much in price.
D.
They go well with Italian food.
【单选题】Whatdoes the woman imply?
A.
She will regret her decision.
B.
She does not think much of her boyfriend.
C.
She will wait for the right time to get married.
D.
She still wants to marry the guy.
【单选题】Early symptoms of acute hepatitis B may include________.
A.
thrombosis , fatigue and diarrhea
B.
palpitation, jaundice and dark urine
C.
nausea, vomiting and loss of appetite
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