皮皮学，免费搜题
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【单选题】
下列传染病哪一个是细菌性的:A.
传染性支气管炎
B.
鸡葡萄球菌病
C.
禽淋巴白血病
D.
传染性法氏囊病
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】下列关于导游员进行沿途导游的作法中,正确的有________。
A.
面带微笑站在车的前部、司机的右后侧
B.
对重要的内容要重复讲解或加以解释
C.
不论任何情况都必须站立讲解
D.
旅游者如果比较疲劳，导游员可少讲解，多让旅游者休息
【简答题】大多数香味物质不稳定,在储运过程中,因为 、 或酶的作用下挥发或分解。
【简答题】三相电路如图所示,已知 Ω,,接在线电压为380V的三相四线制电源上。求:(1)各线电流及中线电流;(2)A线断开时的各线电流及中线电流;(3)中线及A线都断开时各线电流。
【单选题】电路如图 所示, 三相四线制电路, 对称 负载 Y 形连接, 若电源线电压为 380V ,当在 D 点断开时, U 1 为( )。
A.
220V
B.
380V
C.
190V
D.
200V
【单选题】Identify the topic sentence from the following paragraph. There are many things that ESL students can do to improve their English more quickly. They can join an after-school club which will give them ...
A.
There are many things that ESL students can do to improve their English more quickly.
B.
They can join an after-school club which will give them the chance to practise spoken English while doing an activity that they enjoy.
C.
They can also watch films, particularly DVDs with the English subtitles turned on. Best of all, however, is to do plenty of reading for pleasure.
D.
Non-fiction in particular is an excellent way of acquiring a strong academic vocabulary.
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