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BJT共发射极电流增益β的表达式为()
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【单选题】—What can I do in the classroom? —_____. [     ]
A.
You can smoke.
B.
You can play football.
C.
You can read books.
D.
You can run.
【单选题】We hadn’t planned to meet. We met __ chance .
A.
of
B.
in
C.
by
D.
for
【单选题】四角赖利绦虫寄生于()的小肠
A.
反刍兽
B.
C.
D.
水禽
【判断题】玩具是指专门给儿童游戏的物品和材料。
A.
正确
B.
错误
【简答题】一位女士到a商场买鞋,让营业员拿出一双价值560元的女靴试穿,试穿后感到不理想,准备离开。这时营业员要求其支付5元的试穿费,否则不允许离开该店,并对女士恶语相向。商场侵犯了消费者的()权和()权。
【单选题】第31届奥林匹克运动会于2016年8月5日至21日在巴西里约热内卢举行。回答小题 奥林匹克运动会是在奥林匹克主义指导下,以体育运动和四年一度的奥运会为主要活动内容,促进人的生理、心理和社会道德全面发展,在全世界普及奥林匹克主义,维护世界和平的国际社会运动。这表明() ①文化对人的影响是深远持久的②文化作为一种精神力量,对社会产生深刻影响 ③奥林匹克精神离不开物质载体④奥林匹克文化既是民族的,又是世...
A.
①③
B.
②③
C.
①④
D.
②④
【单选题】Why can the content of harmful components in secondhand smoke be several times or even dozens of times higher than that in direct smoke?
A.
Because some people smoke in enclosed spaces.
B.
Because the chemicals in tobacco can cause cancer.
C.
Because insufficient combustion makes secondhand smoke more toxic than the direct smoke.
D.
Because there are more non-smokers than smokers.
【单选题】You are not _____ to smoke here. If you want to smoke, you can go outsi de. [     ]
A.
let
B.
allowed
C.
agreed
D.
made
【单选题】-Do you mind if I smoke here? -_______ You can go to smoke in the next door.
A.
Yes, please.
B.
Never mind.
C.
You'd better not.
D.
Of course not,
【单选题】Do you mind if I smoke here? ()You can go to smoke in the yard.
A.
Yes. please
B.
Never mind
C.
You' d better not.
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